# Unit Converter - OmniConvert — Pro Unit + Currency Converter > Free offline unit and currency converter with calculators and constants. (iPhone/iPad app by Jonathan Chen.) - Source: https://appshunter.io/ios/app/unit-converter-omniconvert/id1602930764 (this page in markdown: same URL + `.md`) - Developer: [Jonathan Chen](https://appshunter.io/developer/1602930766) - Category: Utilities, Productivity - Price: Free with in-app purchases - Rating: 4.98/5 from 42 App Store ratings · 19 written reviews indexed - Age rating: 4+ - Requires: iOS 17.0 · 35 MB - Languages: English - Released: 2022-01-02 - Data updated: 2026-06-08 - Monetization: free with in-app purchases - User reviews in markdown: https://appshunter.io/ios/app/unit-converter-omniconvert/id1602930764/reviews.md ## What is Unit Converter? OmniConvert is a powerful unit and currency converter focused on functionality, usability, and speed. It is completely free, supports a wide variety of conversion categories, and works offline. Exchange rates are updated in real-time (when connected to the internet) and all 166 major world currencies are supported. There are no conversion limits or size restrictions, and it even comes with a dark mode! OmniConvert offers an additional selection of useful calculators (e.g. salary, gratuity, baking) along with compilations of common scientific constants relevant to fields like physics and chemistry. Conversions: Currency, Volume, Mass, Temperature, Time, Length, Speed, Gas, Area, Energy, Pressure, Torque, Data, Angle, Frequency, Planetary Weight Calculators: Salary, Tip, Baking, Percentage, Mortgage, Auto Loan, BMI Constants: Chemistry, Physics, Density, Unit Prefix, Mathematics, Medicine, Astrophysics. Omniconvert is optimized for iPhone X, 11, 12, 13, 14, 15, and 16 as well as the Pro and Max variants of these devices. ## Key features - Unit conversions - Currency conversions - Real-time exchange rates - Offline functionality - Variety of calculators - Scientific constants - Dark mode ## Pricing and in-app purchases Base price: Free. **One-time purchases** | Purchase | Price | Type | | --- | --- | --- | | OmniConvert Pro | $2.99 | one-time | ## Recent user reviews (10 of 19) All indexed reviews: https://appshunter.io/ios/app/unit-converter-omniconvert/id1602930764/reviews.md ### 5/5 — Essential *2025-06-10, version 3.3.1* I couldn’t have made it through med school without the medical section of the app! Everything’s super intuitive and up to date. ### 5/5 — Great job! *2024-02-29* I’ve been with iOS since the first iPad and can’t believe it’s taken this long to discover a free and data friendly converter app. Everyone: check his profile and if he’s local, buy him lunch. ### 5/5 — Love it *2023-09-18, version 1.3.0* Outstanding app, clean design, easy to use, and great when traveling abroad for currency. Really glad I found this through Reddit- stellar! ### 5/5 — Best Converter App For iOS *2023-06-07, version 1.3.0* This app blows the others out of the water. Clean, minimal, and effective design. I like the timestamp signifying when currency rates were last checked. Extremely useful during foreign travels! ### 5/5 — Best converter *2022-11-28, version 1.3.0* The best converter i have ever seen till now. Thank to the creator of this app. ### 5/5 — Amazing *2022-01-28, version 1.2.1* Whoever created this is an absolute genius! So practical and helpful. Nowadays apps like this cost a couple bucks. The developer seems like just a genuinely nice dude who’s trying to help out the community! ### 5/5 — Beautiful, simple interface! *2022-01-28, version 1.2.1* I’ve used it everyday since I installed this app. It’s incredibly helpful and I love how it spans across multiple categories such as currencies, tip handling (much needed!), and even chemistry stuff. Super useful! ### 5/5 — This app is awesome! *2022-01-28, version 1.2.1* Wow this app is great! I use it in my everyday life, more than I thought I would. It comes in handy so often. Please download this app! You won’t regret it! ### 5/5 — Great app for bakers! *2022-01-18, version 1.1.0* I love baking and this app is super helpful to convert recipe amounts for any occasion. I love the easy-to-use screen layout and also how I can ‘Favorite’ my most-used conversions. Would most definitely recommend downloading! ### 5/5 — Great app! *2022-01-17, version 1.1.0* This is a great app and very helpful! Having a currency tool would be beneficial! ## Frequently asked questions about Unit Converter ### What does OmniConvert do? OmniConvert is a versatile application designed for unit and currency conversions. It also includes a selection of useful calculators for tasks like salary and tip calculations, as well as compilations of scientific constants relevant to fields such as physics and chemistry. ### What are the key features of OmniConvert? Key features include a wide array of unit conversion categories (e.g., volume, mass, temperature, length), real-time currency exchange rates for 166 major world currencies, offline functionality, no conversion limits, and a dark mode option. It also offers various calculators and scientific constants. ### Is OmniConvert free to use? Yes, OmniConvert is free to download and use. The app does display advertisements and offers in-app purchases, which may provide additional features or remove ads. ### What devices is OmniConvert compatible with? OmniConvert is optimized for recent iPhone models, including iPhone X, 11, 12, 13, 14, 15, and 16, as well as their Pro and Max variants. It is designed for iOS devices. ### What are some common use cases for OmniConvert? Common use cases include converting measurements for cooking or DIY projects, calculating currency exchanges while traveling, figuring out tips at restaurants, calculating loan payments, or quickly accessing scientific data for studies in physics or chemistry. ## Version history (last 5 releases) ### 4.0.0 — 2025-12-10 Once again... long time no see! Since my last update, I've switched companies and finalized plans to move overseas. OmniConvert 4.0 includes some changes that I think everyone will be happy about. For the free users - ads are now gone! I don't think the incoming ad revenue justified the annoyance I'm sure they imposed for the average user, so I got rid of them. For the pro users, there are two new pro-only conversions (Angle + Frequency) and one new calculator (BMI). I've also made some app-wide improvements and bug fixes that should improve everyone's experience. You can also (finally) reorder your favorites! ### 3.3.1 — 2025-01-06 This update is for the OmniConvert Pro members - thank you for supporting my work! v3.3.1 comes with a new pro-only Planetary Weight conversion, along with 3 pro-only constant categories: Mathematics, Medicine, and Astrophysics. This version also includes a few minor bug fixes and additions to existing categories, many of which were added because of your suggestions - keep them coming! ### 3.2.0 — 2024-09-02 Bug fixes and improvements! These changes should hopefully reduce the number of updates I need to make moving forward. ### 3.1.1 — 2024-08-29 v3.1.1 includes some bug fixes and other improvements! Does anyone REALLY read these anymore? ### 3.1.0 — 2024-08-21 Two updates in a week? Unheard of! • v3.1.0 includes the first pro-only calculators - mortgage and auto loans. Calculate your monthly payment based on your specified home/auto price, down payment, loan term, and interest rate. • You now have the ability to enable/disable thousands separators (e.g. "1,000,000" vs "100000"). Small quality of life improvement! • For our international users, you can now toggle between period and comma decimal separators (e.g. "10.45" vs "10,45") in the settings. • The Gas and Speed categories include two new units as per user request (L/100 km [Gas] and knots [Speed]. • More bug fixes and optimizations under the hood to keep OmniConvert zippy! ## Apps similar to Unit Converter | App | Rating | Price | Category | | --- | --- | --- | --- | | [Advanced Chemistry Calculator](https://appshunter.io/ios/app/advanced-chemistry-calculator/id1638669219) | — | $2.99 | Utilities | | [The Conversion App](https://appshunter.io/ios/app/the-conversion-app/id1507894827) | 4.1 (60) | Free | Utilities | | [US Unit Converter](https://appshunter.io/ios/app/us-unit-converter/id1577905442) | 4.8 (101) | Free | Utilities | | [Electrical Calc Elite](https://appshunter.io/ios/app/electrical-calc-elite/id510284903) | 4.7 (124) | $19.99 | Utilities | | [Converter-Universal Conversion](https://appshunter.io/ios/app/converter-universal-conversion/id423521445) | 4.9 (897) | Free | Utilities | | [Convoto - Unit Converter](https://appshunter.io/ios/app/convoto-unit-converter/id904622054) | 3.1 (234) | Free | Utilities | --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-08.*