# OmniCalc > Scrollable calculator with date math, custom conversions, and saved operations. (iPhone/iPad app by Jellyfilled Studios.) - Source: https://appshunter.io/ios/app/omnicalc/id363882488 (this page in markdown: same URL + `.md`) - Developer: [Jellyfilled Studios](https://appshunter.io/developer/305571437) - Category: Utilities, Productivity - Price: Free - Rating: 4.70/5 from 72 App Store ratings · 32 written reviews indexed - Age rating: 4+ - Requires: iOS 13.0 · 2 MB - Languages: American English - Released: 2010-04-01 - Data updated: 2026-08-18 - Monetization: free - User reviews in markdown: https://appshunter.io/ios/app/omnicalc/id363882488/reviews.md ## What is OmniCalc? Easy to use calculator that lets you scroll through your operations and make changes with instant results. Includes date math functions to easily add or subtract dates from each other. You can also add or subtract days from any date. • Rotate the iPhone/iPad to instantly swap between different calculators. • Annotate and save a series of operations to create your own conversion calculators. • Save formulas or operation history in your own math library. • Date Math is automatically detected in normal operations. Add or subtract dates from each other, add or subtract a number from any date. Includes: • Standard Calculator Functions • Scientific Calculator Functions • Statistical Calculator Functions • Date Math Calculator Functions ## Key features - Scrollable operation history - Instant result updates - Date math functions - Custom conversion calculators - Save formulas and history - Standard, Scientific, Statistical modes ## Recent user reviews (10 of 32) All indexed reviews: https://appshunter.io/ios/app/omnicalc/id363882488/reviews.md ### 5/5 — Super app *2026-05-13, version 6.1* OmniCalc is essential for anyone who wants to do serious calculation. It would appear that the developer is no longer supporting it, since the last update was 4 yrs ago, though the copyright notice is up to date. There is also no way to contact the developer on its website. This is unfortunate, as a Chinese developer is pushing an app with precisely the same name. I worry. ### 5/5 — THE BEST ! *2023-02-09* No data collection. Excellent features. Great layout. Ability to scroll & or save calls. And display options in settings. 5 Stars ! Thank you. ### 5/5 — The best *2022-12-25, version 6.1* This is the best free calculator out there. The developer continually updates it and I am glad it is still available. It has enough features for a casual user. If you turn the orientation horizontally, it turns to a scientific mode which will satisfy advanced users. Recommended 5/5. ### 5/5 — Best calculator ever *2022-04-20, version 6.1* Love the way I can change values with instant results and mix date math ### 5/5 — OmniCalc Is A Very Nice Calculator *2022-03-16, version 6.1* I was looking for a calculator for my iPad and found OmniCalc. This calculator works great on my iPad. I was surprised how many options there were for customizing this calculator. The setup was quick and simple allowing me to get the look and function I wanted. My thanks to the developer for a simple to use calculator that works great. Job well done! ### 5/5 — Great app! *2022-01-09, version 6.0* The date math function is so awesome!!! ### 4/5 — Expectations exceeded! *2020-06-28, version 4.1* Looks can be deceptive but make no mistake, this is a very powerful calculator. The unsophisticated graphics are quickly forgotten after one begins to realise just how powerful this thing is. And with its 100 x 100 registry matrix, it can match a small spreadsheet for basic data analysis and manipulation. The interface and operation is not exactly intuitive and I'm writing this with plenty left to explore, so it was a huge relief to find a comprehensive guide called 'Help' which I suggest is likely to be essential reading for others too! There's a choice of rather uninspiring colour schemes - my preference being 'Peace' - but several different and mostly very good fonts for the readout is really nice - and an unexpected bonus. If I could have one wish though, it would be for all of the buttons to be on screen in landscape orientation. It was only when reading the guide and selecting 'Scientific (iPad)' for portrait mode, that I realised what I was missing! Unfortunately, 'Scientific (iPad)' for landscape mode does not render correctly, leaving several essential buttons completely off screen. The overall feeling is that this app has excellent potential but has been left as a slightly unfinished project. ### 2/5 — Long term date calc of RecentVersions currently have errors *2019-10-08, version 4.1* Long term date calc of RecentVersions currently have errors. The older versions worked perfectly because the app let one year = 365.2422 days, but this current version appears to let one year = 365.2375 days. Also, this cannot be an Apple iOS error because other apps like ,xls apps do calculate correctly, although one must manually adjust them for the absence of the one year between the BCE & ACE when using .xls spreadsheets. Otherwise, OmniCalc would be a totally outstanding app. ### 5/5 — Glad It’s Back *2019-02-18, version 4.1* So happy to see this wonderful app back in the App Store. ### 2/5 — Will there ever be an update?? *2017-03-07, version 3.2* Love this calculator. It was one of the first apps I had ever bought and had been my favourite calculator since. Wish you would update it. Hasn't changed since my iPhone 4. Now a message appears when I open it on my 7plus that it may slow down my device. ## Frequently asked questions about OmniCalc ### What does OmniCalc do? OmniCalc is a user-friendly calculator that allows you to scroll through your operations and make edits with immediate results. It includes standard, scientific, and statistical functions, as well as specialized date math capabilities. ### What are the key features of OmniCalc? Key features include a scrollable operation history for easy editing, instant result updates, date math functions for adding or subtracting dates, the ability to create custom conversion calculators by annotating and saving operations, and a personal math library for saving formulas. ### Is OmniCalc free to use? Yes, OmniCalc is available for free. The provided information indicates no in-app purchases or advertisements, suggesting a completely free experience for users. ### What kind of calculations can I perform with OmniCalc? You can perform standard arithmetic calculations, advanced scientific calculations, statistical functions, and specialized date math. This includes adding or subtracting dates from each other or adding/subtracting a number of days from any given date. ### Can I save my calculations or formulas? Yes, OmniCalc allows you to save a series of operations to create your own custom conversion calculators. You can also save specific formulas or your operation history in your personal math library for future use. ## Version history (last 5 releases) ### 6.1 — 2022-01-28 Minor changes to button fonts and a new Icon ### 6.0 — 2022-01-09 Updated interface to new design Added thousands separator configuration option Added display rounding precision configuration option Added new PLAIN button style (default) Improved dynamic screen sizing for all devices Improved button sizing and alignment for all devices Added new status indicator to show when Date Table entries are present Added new status indicator to show when FORM mode is enabled Added a hints/message line below the equation display Holding AC Button (Clear All) for 4 seconds will now exit FORM mode Changed Excl+/Excl- command to show date in equation display line Fixed bug when removing dates from date table Fixed bug in statistics data table summation: If only 1 element in 1 table, sum would return 0 Fixed bug when removing items from statistics tables Fixed bug in status line where MEM would always appear when only DATA table was in use Fixed landscape scientific IPAD view Updated user manual at www.jellyfilledstudios.com ### 5.0 — 2021-12-23 Corrected fonts being truncated on function buttons ### 4.1 — 2019-02-18 Updated for new OS ### 3.2 — 2010-08-04 Updated to support high resolution graphics of the iPhone 4 Added a detailed help section with a complete explanation of all functions ## Apps similar to OmniCalc | App | Rating | Price | Category | | --- | --- | --- | --- | | [Conversion Calculator - Metric](https://appshunter.io/ios/app/conversion-calculator-metric/id6468678523) | 4.8 (157) | Free | Utilities | | [next.calc: a modern calculator](https://appshunter.io/ios/app/nextcalc-a-modern-calculator/id1470313161) | 5.0 (29) | Free | Utilities | | [Waveform Visualizer • Audiom](https://appshunter.io/ios/app/waveform-visualizer-audiom/id1587308997) | 4.2 (117) | Free | Utilities | | [Unit Converter - OmniConvert](https://appshunter.io/ios/app/unit-converter-omniconvert/id1602930764) | 5.0 (42) | Free | Utilities | | [Calculator Widget Pro •](https://appshunter.io/ios/app/calculator-widget-pro/id6464080498) | 4.5 (11) | Free | Utilities | | [FormatX: Video Audio Converter](https://appshunter.io/ios/app/formatx-video-audio-converter/id6468912985) | 4.6 (10) | 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 2026-08-18.*