--- title: "Rosetta: Unit Converter - Reviews, Revenue and Downloads in United States | Apple App Store" description: "Translate measurements instantly. A calm, ad-free unit converter for everyday checks — currency, weight, length, temperature, and ten more categories. Tap either side to make it the active value; bot" --- # Rosetta: Unit Converter — United States > Offline currency & measurement ![Rosetta App Icon](https://is1-ssl.mzstatic.com/image/thumb/Purple221/v4/a9/70/35/a9703577-199d-e13f-309b-7336763180c4/AppIcon-0-0-1x_U007ephone-0-1-85-220.png/434x0w.png) **Developer:** [Optiwise](https://apptail.io/developer/optiwise-JYVTeb) **Category:** Utilities **Rating:** N/A (0 ratings) **Price:** Free **Bundle ID:** us.optiwise.rosetta **Store:** Apple App Store **Country:** United States **Version:** 1.0 (released 2026-05-08) **Original Release:** 2026-05-08 **Languages:** English **App Store Link:** [Download on Apple App Store](https://apps.apple.com/us/app/app/id6766109378) **AppTail Page:** [https://apptail.io/app/rosetta-unit-converter-IQaA/united-states](https://apptail.io/app/rosetta-unit-converter-IQaA/united-states) ## Rosetta Description Translate measurements instantly. A calm, ad-free unit converter for everyday checks — currency, weight, length, temperature, and ten more categories. Tap either side to make it the active value; both cards are first-class, so you can convert in either direction with one tap. Star up to ten favorites for one-tap reuse from the home screen. Currency rates come from the European Central Bank — cached after your first fetch, so they keep working offline. THIRTEEN CATEGORIES • Currency — 165 ISO currencies, ECB-sourced rates • Length — meters, feet, miles, kilometers, yards, inches • Mass — grams, kilograms, pounds, ounces, stones • Temperature — Celsius, Fahrenheit, Kelvin • Volume — liters, gallons, cups, fluid ounces, milliliters • Speed — m/s, km/h, mph, knots • Area — m², ft², acres, hectares • Time, Energy, Power, Pressure, Data, Angle WHY ROSETTA IS DIFFERENT • No ads. No tracking. No accounts. No analytics SDK ships in the app. • No settings to configure. The defaults are the right defaults. • Works offline. Currency rates cache after one online fetch; everything else needs no network at all. • Two-way input — convert in either direction with a single tap. • Tap any result to copy. A quiet "Copied" toast confirms. • Light and dark mode automatic, with locale-aware number formatting and gentle haptics. Free. Forever free. Made by Optiwise. Support: contact@optiwise.us Site: rosetta.optiwise.us ## Rosetta Screenshots - [Screenshot 1](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/12/8d/ad/128dad22-8029-5611-6f08-bf23ce57c8e7/01-translate-measurements-instantly.png/1242x2688.png) - [Screenshot 2](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/c3/8c/0d/c38c0ddd-0f50-ab07-cea8-b229eab4dc23/02-both-sides-first-class.png/1242x2688.png) - [Screenshot 3](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/19/0b/8d/190b8dde-acac-4180-547e-9cf57b2ef611/03-thirteen-categories.png/1242x2688.png) - [Screenshot 4](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/2e/0f/5d/2e0f5d38-2431-da1c-da94-5338d7281d4b/04-currency-cached-offline.png/1242x2688.png) - [Screenshot 5](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/cf/f5/c7/cff5c73a-2ddd-59dc-dab6-029beccc7ff7/05-star-up-to-ten.png/1242x2688.png) - [Screenshot 6](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/50/5a/d5/505ad5f9-5fbe-6f86-179c-eb71ceb3f162/06-no-ads-no-tracking.png/1242x2688.png) ## Apps Similar to Rosetta - [Conversion Calculator Units](https://apptail.io/app/conversion-calculator-units-Xee/united-states) - [EZ Tolls VA](https://apptail.io/app/ez-tolls-va-EHq/united-states) - [Melnor BT](https://apptail.io/app/melnor-bt-Ebac/united-states) - [Phone Cleaner Ⓞ](https://apptail.io/app/phone-cleaner-Wxec/united-states) - [dewenwils](https://apptail.io/app/dewenwils-ojXc/united-states) - [Duplicate Contact Cleaner Ⓞ](https://apptail.io/app/duplicate-contact-cleaner-tSZc/united-states) - [EDEN Water Timer](https://apptail.io/app/eden-water-timer-DLed/united-states) - [UltimatronFrance](https://apptail.io/app/ultimatronfrance-tupd/united-states) - [Unfollowers Unfollow Tracker](https://apptail.io/app/unfollowers-unfollow-tracker-Jcan/united-states) - [Speed Test Internet Wifi Scan](https://apptail.io/app/speed-test-internet-wifi-scan-FGkn/united-states) ## Rosetta Available In - [United Arab Emirates](https://apptail.io/app/rosetta-unit-converter-IQaA/united-arab-emirates) - [Armenia](https://apptail.io/app/rosetta-unit-converter-IQaA/armenia) - [Belarus](https://apptail.io/app/rosetta-unit-converter-IQaA/belarus) - [Belize](https://apptail.io/app/rosetta-unit-converter-IQaA/belize) - [Ecuador](https://apptail.io/app/rosetta-unit-converter-IQaA/ecuador) - [United Kingdom](https://apptail.io/app/rosetta-unit-converter-IQaA/united-kingdom) - [Grenada](https://apptail.io/app/rosetta-unit-converter-IQaA/grenada) - [Israel](https://apptail.io/app/rosetta-unit-converter-IQaA/israel) - [Cayman Islands](https://apptail.io/app/rosetta-unit-converter-IQaA/cayman-islands) - [Kazakhstan](https://apptail.io/app/rosetta-unit-converter-IQaA/kazakhstan) - [North Macedonia](https://apptail.io/app/rosetta-unit-converter-IQaA/north-macedonia) - [Nigeria](https://apptail.io/app/rosetta-unit-converter-IQaA/nigeria) - [Netherlands](https://apptail.io/app/rosetta-unit-converter-IQaA/netherlands) - [Norway](https://apptail.io/app/rosetta-unit-converter-IQaA/norway) - [Suriname](https://apptail.io/app/rosetta-unit-converter-IQaA/suriname) - [United States](https://apptail.io/app/rosetta-unit-converter-IQaA/united-states) - [Vietnam](https://apptail.io/app/rosetta-unit-converter-IQaA/vietnam) --- ## 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*