--- title: "Zx: Heart Rate Zones Training - Reviews, Revenue and Downloads in United States | Apple App Store" description: "Zx is your personal heart rate coach designed to guide you through your interval training. Create your own interval workouts or download workouts created by the community. Official Zx workouts are upd" --- # Zx: Heart Rate Zones Training — United States > Interval Timer & HIIT Trainer ![Zx: Heart Rate Zones Training App Icon](https://is1-ssl.mzstatic.com/image/thumb/Purple221/v4/ea/dc/10/eadc106d-8e26-d3a2-be5e-66876ed9c2c1/AppIcon-0-0-1x_U007emarketing-0-8-0-85-220.png/400x400bb.png) **Developer:** [OverSphere](https://apptail.io/developer/oversphere-Cvsc) **Category:** Health Fitness **Rating:** 4.3/5 (69 ratings) **Price:** Free **Bundle ID:** net.oversphere.zx **Store:** Apple App Store **Country:** United States **Version:** 1.8.1 (released 2026-07-18) **Original Release:** 2019-12-22 **App Store Link:** [Download on Apple App Store](https://apps.apple.com/us/app/app/id1457355997) **AppTail Page:** [https://apptail.io/app/zx-heart-rate-zones-training-HeT/united-states](https://apptail.io/app/zx-heart-rate-zones-training-HeT/united-states) ## Zx: Heart Rate Zones Training Description Zx is your personal heart rate coach designed to guide you through your interval training. Create your own interval workouts or download workouts created by the community. Official Zx workouts are updated regularly. Zx supports Apple Watch or any compatible stand alone bluetooth heart rate monitor. ◎ Benefits of HIIT: - Weight loss - Improve your body’s ability to burn fat - Increase your anaerobic threshold - Improve your vo2Max - Improve performance in sports - Feel better by releasing beta-endorphins - More fun then steady state training! ◎ Integrates with the Health app to gain deep insight into your training: - View relevant Heart Rate and Workout stats for Day, Week, and Month on the home screen - See which zone your workout heart rate has spent the most time in to help you plan your next workout. ——————-—- App Features ———————— ◎Open Mode (Apple Watch only): - Not up for a guided session? Open session lets you see what Zone you’re in and how long you’ve been in it. ◎ Guided Interval Training - Zx will help you stay in a specific zone for the right amount of time. ◎ Create custom workouts - Studio lets you create custom guided training suited to your personal goals ◎ Download workouts created by other users - See what other users have created, download and remix. Health Disclaimer: Zx cannot treat or diagnose any medical condition. Zx is designed to push you to your maximum heart rate; while there shouldn’t be cause for concern with healthy individuals, always consult with your physician prior to starting any training regimen. Subscription Terms: Your subscription automatically renews every month or year unless auto-renewal is turned off at least 24 hours before the end of the current subscription. 3 day free trial is provided for monthly subscriptions. You will be charged starting at $2.99 per month, depending on the subscription pack. Your account will be charged for a renewed subscription within 24 hours prior to the end of current subscription. You can manage your subscription and switch off the auto-renewal by accessing your iTunes account settings after purchase. You cannot cancel the current subscription during the active subscription period. Any unused part or time-span of a free trial period will be forfeited, as soon as you purchase a subscription. Buy subscribing, you affirm your agreement to our Terms of Use and Privacy Policy. Terms of Use: Privacy Policy: ## Zx: Heart Rate Zones Training Screenshots - [Screenshot 1](https://is1-ssl.mzstatic.com/image/thumb/Purple123/v4/63/87/f7/6387f72c-579e-58a3-0cdf-0d279b3804b8/pr_source.jpg/1242x2688.png) - [Screenshot 2](https://is1-ssl.mzstatic.com/image/thumb/Purple123/v4/aa/69/a1/aa69a104-e12c-6985-372a-0a1e333261b5/pr_source.jpg/1242x2688.png) - [Screenshot 3](https://is1-ssl.mzstatic.com/image/thumb/Purple113/v4/05/db/3a/05db3ae4-fc78-1113-b755-f22a6a637df5/pr_source.jpg/1242x2688.png) - [Screenshot 4](https://is1-ssl.mzstatic.com/image/thumb/Purple113/v4/88/fc/8f/88fc8fc6-c020-1b64-4431-be98fb63d366/pr_source.jpg/1242x2688.png) - [Screenshot 5](https://is1-ssl.mzstatic.com/image/thumb/Purple113/v4/18/e5/f1/18e5f11e-b5f9-790f-a340-15ed3ef8ed61/pr_source.jpg/1242x2688.png) - [Screenshot 6](https://is1-ssl.mzstatic.com/image/thumb/Purple123/v4/87/ef/65/87ef652c-f1a8-8806-c58b-987335843339/pr_source.jpg/1242x2688.png) - [Screenshot 7](https://is1-ssl.mzstatic.com/image/thumb/Purple113/v4/0c/54/25/0c542567-dc6f-7674-02dc-32e975fa3abd/pr_source.jpg/1242x2688.png) ## Zx: Heart Rate Zones Training Rating Breakdown in United States - 5 stars: 47 (68%) - 4 stars: 9 (13%) - 3 stars: 4 (6%) - 2 stars: 5 (7%) - 1 stars: 4 (6%) ## Zx: Heart Rate Zones Training Reviews in United States ### ***** "Fantastic app!" I was looking for an interval timer for my own HIIT training that could also pair with my coros armband to show my heart rate. Paying $14 for this app seemed like a no-brainer when the cheapest watch I could find to show my heart rate was $180. Now I get to see my interval timer and heart rate in the one place. It works perfectly with my coros armband and make sure I stay in the zone during night intensity intervals (while not pushing too hard above my range). Thanks for making such an intuitive and affordable app with great functionality. -- Nats7665!, 2024-09-13 ### *---- "Custom and community workouts not showing on my watch" I’m not able to use the custom and community workouts after paying for this app because they don’t show up on my watch. 😕 -- S.sivabalan, 2024-06-26 ### ****- "Swimming doesn't work" App is promising. While running and cycling work fine, logging a swimming workout fails. It says "Please allow Zx to 'Write Workout Data' in Health and try again. By the way your support website is just a placeholder site. Might want to update that. In addition to the above bug, to be useful during swimming, the alerts would have to be different patterns for above and below zone, and they'd have to be constant. For example, short quick vibrations if below zone and long slow vibrates if above zone. The same kind of constant and differentiated alerts would be useful in other situations (e.g. watch under your sleeve or glove) but especially in swimming when it's not practical to look at the watch face during a lap. -- headquire, 2023-12-13 ### *---- "Eh" I got this app thinking it would give me realtime workout info on what zone I am in and for how many minutes. It’s just like all the other apps. you can only see what zone you are in at that exact moment. It’s not realtime info (the kind you can use to guide your workout -- Biltzzz, 2023-10-20 ### *---- "Rip off" I was looking for something to exactly what this app should do, if it worked! But the studio (self-created) workouts don’t work! They don’t sync with your phone and when you open it on your watch it just spins.. waiting for you to start the workout (that does not appear) on your watch. Biggest waste of $15. I tried to contact support but my email was bounced back and the link from the App Store leads to a page that says coming soon. I’m going to try to request a refund because this is so pointless. A shame because I would have gladly paid the $15 for something that worked as expected. -- BlondieTess, 2023-07-20 ### **--- "Support did not respond" I contacted support about the zone categories double the amount of time I worked out in each zone. I sent a screen shot showing that I worked out 6 minutes in the intensity zone according to my custom heart rate and it recorded over 12 minutes. I requested help and the answer was “crickets”…I’ve been totally ghosted. I would have rated the app a 4 star, otherwise. -- Inddark, 2023-06-07 ### ***** "Apps doesn’t work right" It worked at first but no longer sync with Apple Watch -- Jomega71, 2022-10-30 ### ****- "Like this app" 4 stars. Would give 5 stars if the colored bars in the workout graph also displayed the target heart rate zones like the Polar Beat app. does. -- wingnut0000, 2022-09-21 ### ***** "Watch complication of Z Score please" Watch complication of Z Score please The Zx score on the watch doesn’t match with the fitness level. For example, if I change to level 1, the iPhone app seems to be always at level 3. Please fix, thank you. -- Michsuedg, 2021-01-29 ### **--- "Overrated" The app does nothing special that the normal Apple Watch workout app does not do. It’s designed poorly, there are few glitches. Do not bother buying. -- SZEF_, 2020-06-03 [View all Zx: Heart Rate Zones Training reviews and detailed analytics on AppTail](https://app.apptail.io/signup?utm_campaign=ai-crawl&utm_content=reviews) ## Zx: Heart Rate Zones Training In-App Purchases | Item | Price | |------|-------| | Premium Yearly | $24.99 | | Premium Monthly | $2.99 | | Premium 6 months | $9.99 | | Premium Lifetime Access | $14.99 | ## Zx: Heart Rate Zones Training Discovered Keywords - heart zones training - zx - zones for training - over timer - heart rate zones training ## Apps Similar to Zx: Heart Rate Zones Training - [iRunner Run & Jog Tracker](https://apptail.io/app/irunner-run-jog-tracker-zf/united-states) - [FITIV Run GPS Running Tracker](https://apptail.io/app/fitiv-run-gps-running-tracker-OKg/united-states) - [Heart Health Zone Training](https://apptail.io/app/heart-health-zone-training-LeT/united-states) - [Cardio Workout Companion](https://apptail.io/app/cardio-workout-companion-mgcb/united-states) - [Cross Fit Zone Training](https://apptail.io/app/cross-fit-zone-training-XBFb/united-states) - [Heart Zones Workout](https://apptail.io/app/heart-zones-workout-nyZb/united-states) - [iCardio Workout Tracker](https://apptail.io/app/icardio-workout-tracker-vzsc/united-states) - [Simple Zones](https://apptail.io/app/simple-zones-ZiVc/united-states) - [Zone 2: Heart Rate Training](https://apptail.io/app/zone-2-heart-rate-training-saDk/united-states) - [Zone Trainer: Heart Rate Zones](https://apptail.io/app/zone-trainer-heart-rate-zones-TJPk/united-states) ## Zx: Heart Rate Zones Training Available In - [United States](https://apptail.io/app/zx-heart-rate-zones-training-HeT/united-states) - [Germany](https://apptail.io/app/zx-heart-rate-zones-training-HeT/germany) - [Japan](https://apptail.io/app/zx-heart-rate-zones-training-HeT/japan) - [United Kingdom](https://apptail.io/app/zx-heart-rate-zones-training-HeT/united-kingdom) - [Brazil](https://apptail.io/app/zx-heart-rate-zones-training-HeT/brazil) - [Australia](https://apptail.io/app/zx-heart-rate-zones-training-HeT/australia) - [Netherlands](https://apptail.io/app/zx-heart-rate-zones-training-HeT/netherlands) - [Canada](https://apptail.io/app/zx-heart-rate-zones-training-HeT/canada) - [Belgium](https://apptail.io/app/zx-heart-rate-zones-training-HeT/belgium) - [Mexico](https://apptail.io/app/zx-heart-rate-zones-training-HeT/mexico) - [Spain](https://apptail.io/app/zx-heart-rate-zones-training-HeT/spain) - [France](https://apptail.io/app/zx-heart-rate-zones-training-HeT/france) - [United Arab Emirates](https://apptail.io/app/zx-heart-rate-zones-training-HeT/united-arab-emirates) - [Colombia](https://apptail.io/app/zx-heart-rate-zones-training-HeT/colombia) - [Hungary](https://apptail.io/app/zx-heart-rate-zones-training-HeT/hungary) - [Egypt](https://apptail.io/app/zx-heart-rate-zones-training-HeT/egypt) - [Portugal](https://apptail.io/app/zx-heart-rate-zones-training-HeT/portugal) - [Taiwan](https://apptail.io/app/zx-heart-rate-zones-training-HeT/taiwan) - [Chile](https://apptail.io/app/zx-heart-rate-zones-training-HeT/chile) - [Mauritius](https://apptail.io/app/zx-heart-rate-zones-training-HeT/mauritius) - [Austria](https://apptail.io/app/zx-heart-rate-zones-training-HeT/austria) - [Bahrain](https://apptail.io/app/zx-heart-rate-zones-training-HeT/bahrain) - [Czechia](https://apptail.io/app/zx-heart-rate-zones-training-HeT/czechia) - [Denmark](https://apptail.io/app/zx-heart-rate-zones-training-HeT/denmark) - [Finland](https://apptail.io/app/zx-heart-rate-zones-training-HeT/finland) - [Greece](https://apptail.io/app/zx-heart-rate-zones-training-HeT/greece) - [Indonesia](https://apptail.io/app/zx-heart-rate-zones-training-HeT/indonesia) - [Ireland](https://apptail.io/app/zx-heart-rate-zones-training-HeT/ireland) - [Kazakhstan](https://apptail.io/app/zx-heart-rate-zones-training-HeT/kazakhstan) - [Lithuania](https://apptail.io/app/zx-heart-rate-zones-training-HeT/lithuania) - [Norway](https://apptail.io/app/zx-heart-rate-zones-training-HeT/norway) - [New Zealand](https://apptail.io/app/zx-heart-rate-zones-training-HeT/new-zealand) - [Saudi Arabia](https://apptail.io/app/zx-heart-rate-zones-training-HeT/saudi-arabia) - [Sweden](https://apptail.io/app/zx-heart-rate-zones-training-HeT/sweden) - [Slovakia](https://apptail.io/app/zx-heart-rate-zones-training-HeT/slovakia) - [Thailand](https://apptail.io/app/zx-heart-rate-zones-training-HeT/thailand) - [Türkiye](https://apptail.io/app/zx-heart-rate-zones-training-HeT/turkey) - [Ukraine](https://apptail.io/app/zx-heart-rate-zones-training-HeT/ukraine) - [South Africa](https://apptail.io/app/zx-heart-rate-zones-training-HeT/south-africa) - [Hong Kong SAR China](https://apptail.io/app/zx-heart-rate-zones-training-HeT/hong-kong) - [Croatia](https://apptail.io/app/zx-heart-rate-zones-training-HeT/croatia) - [Brunei](https://apptail.io/app/zx-heart-rate-zones-training-HeT/brunei) - [Venezuela](https://apptail.io/app/zx-heart-rate-zones-training-HeT/venezuela) - [Tunisia](https://apptail.io/app/zx-heart-rate-zones-training-HeT/tunisia) - [Israel](https://apptail.io/app/zx-heart-rate-zones-training-HeT/israel) - [India](https://apptail.io/app/zx-heart-rate-zones-training-HeT/india) - [Iceland](https://apptail.io/app/zx-heart-rate-zones-training-HeT/iceland) - [Italy](https://apptail.io/app/zx-heart-rate-zones-training-HeT/italy) - [China](https://apptail.io/app/zx-heart-rate-zones-training-HeT/china) - [Senegal](https://apptail.io/app/zx-heart-rate-zones-training-HeT/senegal) - [Dominican Republic](https://apptail.io/app/zx-heart-rate-zones-training-HeT/dominican-republic) - [Algeria](https://apptail.io/app/zx-heart-rate-zones-training-HeT/algeria) - [Ecuador](https://apptail.io/app/zx-heart-rate-zones-training-HeT/ecuador) - [Estonia](https://apptail.io/app/zx-heart-rate-zones-training-HeT/estonia) - [Switzerland](https://apptail.io/app/zx-heart-rate-zones-training-HeT/switzerland) - [Belarus](https://apptail.io/app/zx-heart-rate-zones-training-HeT/belarus) - [Grenada](https://apptail.io/app/zx-heart-rate-zones-training-HeT/grenada) - [Ghana](https://apptail.io/app/zx-heart-rate-zones-training-HeT/ghana) - [Honduras](https://apptail.io/app/zx-heart-rate-zones-training-HeT/honduras) - [Jordan](https://apptail.io/app/zx-heart-rate-zones-training-HeT/jordan) - [Kenya](https://apptail.io/app/zx-heart-rate-zones-training-HeT/kenya) - [South Korea](https://apptail.io/app/zx-heart-rate-zones-training-HeT/south-korea) - [Kuwait](https://apptail.io/app/zx-heart-rate-zones-training-HeT/kuwait) - [Cayman Islands](https://apptail.io/app/zx-heart-rate-zones-training-HeT/cayman-islands) - [Lebanon](https://apptail.io/app/zx-heart-rate-zones-training-HeT/lebanon) - [Sri Lanka](https://apptail.io/app/zx-heart-rate-zones-training-HeT/sri-lanka) - [Angola](https://apptail.io/app/zx-heart-rate-zones-training-HeT/angola) - [Luxembourg](https://apptail.io/app/zx-heart-rate-zones-training-HeT/luxembourg) - [Latvia](https://apptail.io/app/zx-heart-rate-zones-training-HeT/latvia) - [Madagascar](https://apptail.io/app/zx-heart-rate-zones-training-HeT/madagascar) - [North Macedonia](https://apptail.io/app/zx-heart-rate-zones-training-HeT/north-macedonia) - [Mali](https://apptail.io/app/zx-heart-rate-zones-training-HeT/mali) - [Macao SAR China](https://apptail.io/app/zx-heart-rate-zones-training-HeT/macau) - [Malta](https://apptail.io/app/zx-heart-rate-zones-training-HeT/malta) - [Bulgaria](https://apptail.io/app/zx-heart-rate-zones-training-HeT/bulgaria) - [Malaysia](https://apptail.io/app/zx-heart-rate-zones-training-HeT/malaysia) - [Nigeria](https://apptail.io/app/zx-heart-rate-zones-training-HeT/nigeria) - [Nicaragua](https://apptail.io/app/zx-heart-rate-zones-training-HeT/nicaragua) - [Azerbaijan](https://apptail.io/app/zx-heart-rate-zones-training-HeT/azerbaijan) - [Vietnam](https://apptail.io/app/zx-heart-rate-zones-training-HeT/vietnam) - [Nepal](https://apptail.io/app/zx-heart-rate-zones-training-HeT/nepal) - [Oman](https://apptail.io/app/zx-heart-rate-zones-training-HeT/oman) - [Panama](https://apptail.io/app/zx-heart-rate-zones-training-HeT/panama) - [Peru](https://apptail.io/app/zx-heart-rate-zones-training-HeT/peru) - [Philippines](https://apptail.io/app/zx-heart-rate-zones-training-HeT/philippines) - [Pakistan](https://apptail.io/app/zx-heart-rate-zones-training-HeT/pakistan) - [Poland](https://apptail.io/app/zx-heart-rate-zones-training-HeT/poland) - [Argentina](https://apptail.io/app/zx-heart-rate-zones-training-HeT/argentina) - [Paraguay](https://apptail.io/app/zx-heart-rate-zones-training-HeT/paraguay) - [Qatar](https://apptail.io/app/zx-heart-rate-zones-training-HeT/qatar) - [Romania](https://apptail.io/app/zx-heart-rate-zones-training-HeT/romania) - [Russia](https://apptail.io/app/zx-heart-rate-zones-training-HeT/russia) - [Armenia](https://apptail.io/app/zx-heart-rate-zones-training-HeT/armenia) - [Uruguay](https://apptail.io/app/zx-heart-rate-zones-training-HeT/uruguay) - [Singapore](https://apptail.io/app/zx-heart-rate-zones-training-HeT/singapore) - [Slovenia](https://apptail.io/app/zx-heart-rate-zones-training-HeT/slovenia) - [Cyprus](https://apptail.io/app/zx-heart-rate-zones-training-HeT/cyprus) - [Uzbekistan](https://apptail.io/app/zx-heart-rate-zones-training-HeT/uzbekistan) - [Jamaica](https://apptail.io/app/zx-heart-rate-zones-training-HeT/jamaica) - [Suriname](https://apptail.io/app/zx-heart-rate-zones-training-HeT/suriname) - [Bermuda](https://apptail.io/app/zx-heart-rate-zones-training-HeT/bermuda) - [El Salvador](https://apptail.io/app/zx-heart-rate-zones-training-HeT/el-salvador) - [Cambodia](https://apptail.io/app/zx-heart-rate-zones-training-HeT/cambodia) - [Barbados](https://apptail.io/app/zx-heart-rate-zones-training-HeT/barbados) - [Botswana](https://apptail.io/app/zx-heart-rate-zones-training-HeT/botswana) - [Namibia](https://apptail.io/app/zx-heart-rate-zones-training-HeT/namibia) - [British Virgin Islands](https://apptail.io/app/zx-heart-rate-zones-training-HeT/british-virgin-islands) - [Uganda](https://apptail.io/app/zx-heart-rate-zones-training-HeT/uganda) - [Belize](https://apptail.io/app/zx-heart-rate-zones-training-HeT/belize) --- ## About AppTail [AppTail](https://apptail.io) is a mobile app intelligence platform providing app analytics, ASO (App Store Optimization) tools, keyword tracking, competitor analysis, revenue estimates, and review monitoring for iOS App Store apps. Track your app's performance, discover ranking keywords, monitor competitors, and analyze market trends. - [Search Apps](https://apptail.io) - [Top Charts](https://apptail.io/top-iphone-apps) - [Sign Up for Full Access](https://app.apptail.io/signup?utm_campaign=ai-crawl&utm_content=footer) *Data provided by [AppTail](https://apptail.io) - Mobile App Intelligence Platform*