# OneCalc: All-in-one Calculator — Calculates everything. Try it. > A free, ad-supported calculator app with over 40 specialized calculation tools. (iPhone/iPad app by tasser gyati.) - Source: https://appshunter.io/ios/app/onecalc-all-in-one-calculator/id1324977193 (this page in markdown: same URL + `.md`) - Developer: [tasser gyati](https://appshunter.io/developer/1324926550) - Category: Productivity, Utilities - Price: Free - Rating: 4.60/5 from 5,051 App Store ratings · 295 written reviews indexed - Age rating: 4+ - Requires: iOS 15.6 · 6 MB - Languages: American English, French (France), German (Germany), Italian, Japanese, Korean, Brazilian Portuguese, Russian, Chinese (Simplified, China), European Spanish and 1 more - Released: 2018-02-21 - Data updated: 2026-08-27 - Monetization: free with in-app purchases - User reviews in markdown: https://appshunter.io/ios/app/onecalc-all-in-one-calculator/id1324977193/reviews.md ## What is OneCalc? All-in-one Calculator is a free calculator app for iPhone and iPad featuring over 40+ calculators and unit converters categorized under finance, health, date & time, construction, shopping and everyday math. Simple yet powerful, the following features are built into this all-in-one calculator app:- STANDARD CALCULATOR • Includes percent key, negative sign, memory functions, brackets and history viewer. • Advanced mode includes functions for trigonometry, roots, exponents and logarithm found in scientific calculators. UNIT CONVERTER • Convert values between metric/ imperial units with conversion calculators for temperature, length, weight, area, volume and many more. FINANCIAL CALCULATORS • Interest calculators using simple and compound interest • Loan calculator with amortization schedule • Savings calculator to calculate future value and monthly savings amount • Currency converter HEALTH -Keep track of your body weight with these calculators:- • BMI calculator • Calories burnt calculator • Running Pace calculator EVERYDAY MATH • Percentage calculator • Fraction calculator • Rounding calculator • Area/ Volume calculator • Right-triangle calculator CONSTRUCTION -Estimate material requirements for small repair works/ DIY projects with these calculators:- • Brick calculator • Concrete calculator • Tiles calculator • Lumber volume calculator • Land area calculator DATE & TIME -Find duration between two date/ time values in months, weeks, days, hours, and minutes. • Date calculator (Also useful for age calculation) • Time calculator • Calculators to add/ subtract date and time BUSINESS -These calculators are useful when shopping and for those who run small business. • Profit margin calculator • Price markup calculator • Discount calculator • Tip and split calculator • Sales tax/ VAT calculator ## Key features - Over 40 calculators and unit converters - Standard and scientific calculator functions - Financial calculators (interest, loan, currency) - Health calculators (BMI, calories, pace) - Construction material calculators - Date and time duration calculations - Business and shopping calculators ## What do users think of OneCalc? Overall sentiment: positive **Pros** - 🚀 Excellent app with many handy extras - 👍 Easy to use and one of the daily drivers - 👍 Helps with work - 👍 Great for calculations and conversions - 👍 Includes fractions - 👍 Perfect for construction and accounting tasks - 👍 Sleek modern design with lots of features - 👍 Useful for students and middle schoolers - 👍 Versatile and has everything needed **Cons** - 🐛 Crashes when using the 'More' section - 🐛 Incorrect date duration calculations - 🔍 Ads can be intrusive and disrupt calculations - 🔍 Confusing keyboard layout with underlined keys - 🔍 Paid version still shows ads - 🔍 Lacks scientific functions needed for homework **Commonly reported bugs** - Crashes when using the 'More' section - Incorrect date duration calculations - Paid version still shows ads **Most requested features** - Add more than 2 slots for conversions - Include a 'log' feature - Add a 'simplify fractions' unit - Improve the 'Date duration' calculator - Add a 'Business' mode with cost, sell, and margin keys - Add a millimeters conversion option - Implement a 'clear' button to easily delete fields ## Recent user reviews (10 of 295) All indexed reviews: https://appshunter.io/ios/app/onecalc-all-in-one-calculator/id1324977193/reviews.md ### 2/5 — My issue *2026-08-06, version 1.6* I like the app. I paid for no ads. Now I get very annoying ads. ### 4/5 — HV *2026-08-01, version 1.6* Works great with many options ### 1/5 — Feedback *2026-07-25, version 1.6* The calculator is great but I HATE the gambling and betting adds! Terrible and difficult to refuse or reject! They are the worst and must be removed! Imagine a child using this app and being tempted to gamble!! Grrr ### 1/5 — User *2026-06-22, version 1.6* Got a fake screenshot that filled my screen with fake your phone is infected that had a click this link which leads to scammers trying to steal passwords for money etc ### 1/5 — 有广告 *2026-04-23, version 1.6* 充钱解锁无广告 ### 4/5 — Good *2026-04-22, version 1.6* Has adds- but amazing otherwise ### 5/5 — VG calculator *2026-03-31, version 1.6* I really like this calculator. All the math functions i need and then some. ### 2/5 — Not a fan *2026-03-30, version 1.6* Great calculator. Hate the ads and the model to turn them off temporarily. Just let me pay for it for NO ADS! ### 5/5 — five stars *2026-01-31, version 1.6* Best thing I ever got ### 5/5 — Pas mal du tout! *2026-01-31* Pratique, clair, accessible ## Frequently asked questions about OneCalc ### What does the All-in-one Calculator app do? This app provides a free, ad-supported collection of over 40 specialized calculators and unit converters. It covers a wide range of categories including finance, health, date and time, construction, shopping, and everyday math, making it a versatile tool for various calculation needs. ### What are the key features of this calculator app? Key features include a standard calculator with advanced scientific functions, a unit converter for metric/imperial units, financial calculators for loans and savings, health trackers like BMI and calorie calculators, construction material estimators, and date/time duration calculators. ### Is this calculator app free to use? Yes, the app is free to download and use. However, it does contain advertisements. There are no in-app purchases mentioned in the provided description. ### What devices is this calculator app compatible with? The app is designed for iPhone and iPad devices. It offers a comprehensive set of tools suitable for a variety of calculation tasks on these Apple mobile platforms. ### What are some common use cases for this app? Common use cases include calculating loan payments and interest, converting currencies, tracking health metrics like BMI, estimating materials for DIY projects, calculating profit margins, and finding the duration between dates or times. ## Version history (last 5 releases) ### 1.6.1 — 2026-08-17 Minor improvements ### 1.6 — 2025-12-26 Bug fixes and minor improvements ### 1.5.6 — 2025-06-26 Bug-fixes and minor improvements ### 1.5.5 — 2025-03-20 Bug-fixes and improvements ### 1.5.4 — 2025-03-05 Bug-fixes and minor improvements ## Apps similar to OneCalc | App | Rating | Price | Category | | --- | --- | --- | --- | | [Calculator´](https://appshunter.io/ios/app/calculator/id878851717) | 4.6 (465) | Free | Productivity | | [ClevCalc - Calculator](https://appshunter.io/ios/app/clevcalc-calculator/id1221235593) | 4.7 (13,021) | Free | Productivity | | [iCalc: Photo Math Calculator](https://appshunter.io/ios/app/icalc-photo-math-calculator/id6448191549) | 4.4 (354) | Free | Productivity | | [Fraction Calculator Plus #1](https://appshunter.io/ios/app/fraction-calculator-plus-1/id580778301) | 4.9 (22,168) | Free | Productivity | | [OneCalc+ All-in-one Calculator](https://appshunter.io/ios/app/onecalc-plus-all-in-one-calculator/id1324977953) | 4.7 (512) | $3.99 | Productivity | | [MyScript Calculator](https://appshunter.io/ios/app/myscript-calculator/id1304488725) | 4.5 (1,508) | $2.99 | Productivity | ## More apps by tasser gyati - [Simple Calculator.](https://appshunter.io/ios/app/simple-calculator/id1324926551) - [Simple Calculator. +](https://appshunter.io/ios/app/simple-calculator-plus/id1324927779) - [OneCalc+ All-in-one Calculator](https://appshunter.io/ios/app/onecalc-plus-all-in-one-calculator/id1324977953) - [MathStep: Basic Math Skills](https://appshunter.io/ios/app/mathstep-basic-math-skills/id1481564896) All apps by tasser gyati: https://appshunter.io/developer/1324926550 ## Related topics [retail calculators](https://appshunter.io/ios/topics/retail-calculators) · [logcaliper](https://appshunter.io/ios/topics/logcaliper) · [nuklidcalc](https://appshunter.io/ios/topics/nuklidcalc) · [all in one calculator](https://appshunter.io/ios/topics/all-in-one-calculator) · [thermal insulation calculator](https://appshunter.io/ios/topics/thermal-insulation-calculator) · [tax calculator gas](https://appshunter.io/ios/topics/tax-calculator-gas) · [land survey calculator](https://appshunter.io/ios/topics/land-survey-calculator) · [sycorp calculator](https://appshunter.io/ios/topics/sycorp-calculator) · [equal spacing calculator](https://appshunter.io/ios/topics/equal-spacing-calculator) · [tasser gyati](https://appshunter.io/ios/topics/tasser-gyati) · [bunco calc](https://appshunter.io/ios/topics/bunco-calc) · [bvpf wood calculator](https://appshunter.io/ios/topics/bvpf-wood-calculator) · [gammon api gravity calculator](https://appshunter.io/ios/topics/gammon-api-gravity-calculator) · [miter pipe calculator](https://appshunter.io/ios/topics/miter-pipe-calculator) · [concrete calculator xneat](https://appshunter.io/ios/topics/concrete-calculator-xneat) · [log calculator](https://appshunter.io/ios/topics/log-calculator) · [atlas earth calculator](https://appshunter.io/ios/topics/atlas-earth-calculator) · [cooking baking calculators](https://appshunter.io/ios/topics/cooking-baking-calculators) · [all in one calculators](https://appshunter.io/ios/topics/all-in-one-calculators) · [energy calculator](https://appshunter.io/ios/topics/energy-calculator) --- *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 2026-08-27.*