--- title: "Flex AI Workout Trainer & Log - Reviews, Revenue and Downloads in United States | Apple App Store" description: "Flex AI is the world’s first true AI personal trainer — built for lifters who want to train smarter, progress faster, and perfect their form. Whether you’re chasing size, strength, or consistency, Fl" --- # Flex AI Workout Trainer & Log — United States > Fitness Tracker & Gym Planner ![Flex AI Workout Trainer & Log App Icon](https://is1-ssl.mzstatic.com/image/thumb/Purple211/v4/9f/73/05/9f730546-dd1c-a4c4-b6e0-79c2e33b45b7/flexIcon-0-0-1x_U007ephone-0-1-0-P3-85-220.png/400x400bb.png) **Developer:** [Flex Artificial Intelligence](https://apptail.io/developer/flex-artificial-intelligence-pooc) **Category:** Health Fitness **Rating:** 4.6/5 (2,409 ratings) **Price:** Free **Bundle ID:** com.flexfitnessapp.flexinternal **Store:** Apple App Store **Country:** United States **Version:** 3.1 (released 2026-04-09) **Original Release:** 2021-12-28 **App Store Link:** [Download on Apple App Store](https://apps.apple.com/us/app/app/id1446354547) **AppTail Page:** [https://apptail.io/app/flex-ai-workout-trainer-log-vBq/united-states](https://apptail.io/app/flex-ai-workout-trainer-log-vBq/united-states) ## Flex AI Workout Trainer & Log Description Flex AI is the world’s first true AI personal trainer — built for lifters who want to train smarter, progress faster, and perfect their form. Whether you’re chasing size, strength, or consistency, Flex uses real-time AI to guide every rep, adjust your program, and keep you motivated through challenges, leaderboards, and streaks. - Your AI Coach, Every Rep Personalized workouts built automatically by AI personas that learn your goals, history, and preferences. Real-time form feedback powered by patented computer-vision AI — get instant corrections on squats, bench, deadlift, rows, and more. Adaptive progression and deloading backed by sports-science principles — no spreadsheets, no guesswork. - Train Smarter — See Results AI tracks your strength curve and increases weight when you’re ready. Visual progress graphs show PRs, volume, and recovery trends. Track sets, reps, and tempo with a tap — or automatically with Apple Watch. - Stay Motivated & Connected Join a global community of lifters. Compete on leaderboards, build streaks, and earn badges. Post progress photos, celebrate milestones, and share results. - Accessible to Everyone Free to start with all core features included. Upgrade anytime for advanced AI coaching and premium analytics. Designed for all experience levels — from beginners to pros. - Why Flex AI Real-time AI form feedback (patented) Adaptive, science-based programming Progress tracking & recovery insights Gamified streaks + leaderboards Apple Watch integration Built for hypertrophy & strength goals Start Training Smarter — Today Download Flex AI and experience personal training powered by real AI. Perfect your form. Unlock your best lift. Train smarter — free on iPhone + Apple Watch. ## Flex AI Workout Trainer & Log Screenshots - [Screenshot 1](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/7f/ba/38/7fba38a7-3a5c-71ba-9355-af7e346b27b7/a965da84-ec44-4e6f-bca8-5e70a748c5ad_Flex_AI_Inc_Flex_Fitness_iOS5.5_Screenshots-Resizing_V1_01B.png/392x696bb.png) - [Screenshot 2](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/74/48/d7/7448d7d4-49b9-0681-cbc8-6f9b6bcc239a/5001c687-7311-4916-a69f-880c79930e3c_Flex_AI_Inc_Flex_Fitness_iOS5.5_Screenshots-Resizing_V1_02B.png/392x696bb.png) - [Screenshot 3](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/76/9e/17/769e17b5-4eb8-9542-2553-dfffaa5c8b58/95dce176-81cb-4182-8801-4232ffa5883f_Flex_AI_Inc_Flex_Fitness_iOS5.5_Screenshots-Resizing_V1_03.png/392x696bb.png) - [Screenshot 4](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/f3/f1/54/f3f15483-3d0c-1fcf-ccd8-b3b06f911318/61d08cc4-d74d-46af-bb11-18cfb709c92c_Flex_AI_Inc_Flex_Fitness_iOS5.5_Screenshots-Resizing_V1_04.png/392x696bb.png) - [Screenshot 5](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/aa/99/e6/aa99e673-4026-33ef-ad26-235b3a2c6134/4bec526f-1d34-486a-a435-13a65d419ed4_Flex_AI_Inc_Flex_Fitness_iOS5.5_Screenshots-Resizing_V1_05.png/392x696bb.png) - [Screenshot 6](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/51/8d/a9/518da94e-e46d-05f9-a0dd-550bba4355cb/a4b5e432-fee2-407b-b203-ffa29efa1fc3_Flex_AI_Inc_Flex_Fitness_iOS5.5_Screenshots-Resizing_V1_06.png/392x696bb.png) - [Screenshot 7](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/93/5e/12/935e1269-77ef-e8d2-c3f9-9dda0a18f6a5/11405fca-1133-4878-a479-7fe20f4cfcff_Flex_AI_Inc_Flex_Fitness_iOS5.5_Screenshots-Resizing_V1_07.png/392x696bb.png) - [Screenshot 8](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/22/fd/0c/22fd0c2d-0051-f61c-0a6c-b3619b1ce4f5/8c27441a-a71a-43da-878e-45428166b1a2_Flex_AI_Inc_Flex_Fitness_iOS5.5_Screenshots-Resizing_V1_08.png/392x696bb.png) - [Screenshot 9](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/b3/ea/ff/b3eaffb6-c530-84a5-191d-5afa137e2957/92ef8034-6151-40dc-889b-da3c6ef0f712_Flex_AI_Inc_Flex_Fitness_iOS5.5_Screenshots-Resizing_V1_09.png/392x696bb.png) ## Flex AI Workout Trainer & Log Rating Breakdown in United States - 5 stars: 1,955 (81%) - 4 stars: 260 (11%) - 3 stars: 63 (3%) - 2 stars: 40 (2%) - 1 stars: 90 (4%) ## Flex AI Workout Trainer & Log Reviews in United States ### ***-- "Not a free app" The app promotes that it’s free but much of the content is available only through a paid subscription. You can search online for workout routines and create your own workout which is rather handy -- MissieSk, 2024-12-31 ### ***** "I 🩵 It" I admire the widget because it allows me to see what I have planned for the day without opening the app, I recently just updated the app and found a whole new adjustments and changes that I immediately heavily fell in love with. • I like how I can add a certain workout to any day, whether its biweekly, weekly, etc. • I love the gym community so this is pretty much my comfort spot, and I love how much people are sharing their progress! • And I like when I'm done creating a workout for some other day, It's based on an estimate on how many calories I burn, and how long it'll take for me to finish that workout. I love this Workout overall, it's helped me watch my calorie burning, steps taking, and shows me how to correctly do a couple of workouts that I haven't done before. -- didiacorn, 2024-12-20 ### ***** "Very fun" Very easy to use. My favorite workout tracker. I love the 1 rep max calculator and rankings against other users. Super fun -- ianl212, 2024-12-11 ### **--- "Almost great" I was so excited to use this app but after a few weeks, I canceled my subscription. It has a beautiful design and I love that you can create custom exercises but the plate calculator and AI progression are very glitchy and not working properly. This app may be great if they fix glitches but for now, I’ll stick with Alpha Progression. -- Brinkmanc, 2024-12-05 ### ****- "Good for detailed tracking" Great for saving workouts whether these are cardio, calisthenics, or strength training. The app has a bank of exercises to choose from and if needed, you can create custom ones. You can group exercises into supersets and set rest times between reps. Also, if competition and point systems motivate you to exercise, then this app is for you! You earn points for every workout and can unlock achievements for more points. If you really want to unleash your competitiveness, view the rankings. It’ll really humble you. I left off a star because it’d be more convenient if I could add workouts anytime like the MyFitness App, which allows you to manually fill out the date and time for any previous day. I like this because sometimes I forget to track workouts and this app (at least the free version) doesn’t allow you to add a workout to a previous day. -- wakeup2, 2024-11-15 ### ***** "I like it" This is really my first experience with an app like this, but I find it is really easy to use and it keeps me motivated and focused. Highly recommend. -- vassaloppet, 2024-11-14 ### ***** "Great App, Some drawbacks" I love this app so far and it is very convenient. The best parts by far are the timer and rest time features. They help so much with staying on track. The app is very functional without premium to get an idea of how it works without having to get a free trial. But after using it premium is such a great luxury. The one gripe I have with the app is the fact that the social and achievement aspects are so hard to navigate. One thing they could do to really finish this app is to add the muscle group body from arrow, and implement a similar pr focused social and achievement aspect. Love you Flex Fitness! -- Susaybaka, 2024-11-11 ### ***** "Highest Quality Workout Recorder" The UI looks clean, everything works smoothly and you don't need Pro to enjoy it -- Bug Much?, 2024-11-04 ### ***** "Flex Rating" Best workout app out there -- Dylan Myllymaki, 2024-10-29 ### ***** "Worth every penny" If you’ve been looking for a workout app, you can stop right here. Really and truly, this app is made for first timers as well as the people looking to take their workouts to the next level. It doesn’t matter where you’re at in your fitness journey, this app will help you get where you wanna be. Premade workouts, plans, and a community of supportive people. I’ve been using it for three weeks so far and I can already see changes in myself. I promise you this is the app you’re looking for. -- Joshkrat, 2024-10-12 [View all Flex AI Workout Trainer & Log reviews and detailed analytics on AppTail](https://app.apptail.io/signup?utm_campaign=ai-crawl&utm_content=reviews) ## Flex AI Workout Trainer & Log In-App Purchases | Item | Price | |------|-------| | Premium Yearly Subscription | $59.99 | | Premium Subscription Monthly | $9.99 | ## Flex AI Workout Trainer & Log Discovered Keywords - workout routines - fitness tracker - workout log - fitness trainer - workout tracker - gym workouts - fitness workouts - flex - track gym progress - the flex ## Apps Similar to Flex AI Workout Trainer & Log - [JEFIT Workout Plan Gym Tracker](https://apptail.io/app/jefit-workout-plan-gym-tracker-Qwb/united-states) - [RepCount - Gym Workout Tracker](https://apptail.io/app/repcount-gym-workout-tracker-fgd/united-states) - [Gymshark Training and Fitness](https://apptail.io/app/gymshark-training-and-fitness-EQj/united-states) - [GymStreak: AI Personal Trainer](https://apptail.io/app/gymstreak-ai-personal-trainer-HDo/united-states) - 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[Netherlands](https://apptail.io/app/flex-ai-workout-trainer-log-vBq/netherlands) - [Australia](https://apptail.io/app/flex-ai-workout-trainer-log-vBq/australia) - [Italy](https://apptail.io/app/flex-ai-workout-trainer-log-vBq/italy) - [France](https://apptail.io/app/flex-ai-workout-trainer-log-vBq/france) - [South Africa](https://apptail.io/app/flex-ai-workout-trainer-log-vBq/south-africa) - [Mexico](https://apptail.io/app/flex-ai-workout-trainer-log-vBq/mexico) - [Brazil](https://apptail.io/app/flex-ai-workout-trainer-log-vBq/brazil) - [Spain](https://apptail.io/app/flex-ai-workout-trainer-log-vBq/spain) - [Türkiye](https://apptail.io/app/flex-ai-workout-trainer-log-vBq/turkey) - [Romania](https://apptail.io/app/flex-ai-workout-trainer-log-vBq/romania) - [Philippines](https://apptail.io/app/flex-ai-workout-trainer-log-vBq/philippines) - [Denmark](https://apptail.io/app/flex-ai-workout-trainer-log-vBq/denmark) - [Sweden](https://apptail.io/app/flex-ai-workout-trainer-log-vBq/sweden) - [Norway](https://apptail.io/app/flex-ai-workout-trainer-log-vBq/norway) - [Ireland](https://apptail.io/app/flex-ai-workout-trainer-log-vBq/ireland) - [Ukraine](https://apptail.io/app/flex-ai-workout-trainer-log-vBq/ukraine) - [Egypt](https://apptail.io/app/flex-ai-workout-trainer-log-vBq/egypt) - [New Zealand](https://apptail.io/app/flex-ai-workout-trainer-log-vBq/new-zealand) - [Belgium](https://apptail.io/app/flex-ai-workout-trainer-log-vBq/belgium) - [United Arab Emirates](https://apptail.io/app/flex-ai-workout-trainer-log-vBq/united-arab-emirates) - [Switzerland](https://apptail.io/app/flex-ai-workout-trainer-log-vBq/switzerland) - [Poland](https://apptail.io/app/flex-ai-workout-trainer-log-vBq/poland) - [Pakistan](https://apptail.io/app/flex-ai-workout-trainer-log-vBq/pakistan) - [Bulgaria](https://apptail.io/app/flex-ai-workout-trainer-log-vBq/bulgaria) - [Austria](https://apptail.io/app/flex-ai-workout-trainer-log-vBq/austria) - [Hungary](https://apptail.io/app/flex-ai-workout-trainer-log-vBq/hungary) - 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[Yemen](https://apptail.io/app/flex-ai-workout-trainer-log-vBq/yemen) --- ## 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. 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