# OneCalc vs Simple Note

The clearest difference is price: OneCalc at Free against Simple Note's $0.99. OneCalc also leads on device support (3 vs 1) and iOS requirement (15.6 vs 17.6). Simple Note's advantage is ads (none vs shown) and update cadence (every 8 days vs every 3 months). On in-app purchases there is nothing between them.

OneCalc is free to download; Simple Note costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

OneCalc ships an update every 3 months, Simple Note every 8 days. The most recent releases landed on November 2, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | OneCalc | Simple Note |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Rating | **[4.6 (5.1K ratings)](https://appshunter.io/ios/app/onecalc-all-in-one-calculator/id1324977193/reviews)** | — |
| Number of ratings | **5.1K** | — |
| Positive reviews | 71.8% of reviews | — |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 3 months | **Every 8 days** |
| Monetization | Free with in-app purchases | — |
| Size | 6 MB | 2 MB |
| Requires iOS | **15.6** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [tasser gyati](https://appshunter.io/developer/1324926550) | [Nicholas Milazzo](https://appshunter.io/developer/6811719728) |

## What reviewers say

### OneCalc

[App page](https://appshunter.io/ios/app/onecalc-all-in-one-calculator/id1324977193)

This app offers a comprehensive suite of over 40 calculators and unit converters for various needs, including finance, health, construction, and everyday math. It features standard, scientific, and specialized calculators for tasks like loan amortization, currency conversion, and material estimation.

**Highlights:** 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

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 🚀 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

**What reviewers complain about**

- 🐛 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

**Reported bugs**

- Crashes when using the 'More' section
- Incorrect date duration calculations
- Paid version still shows ads

**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


### Simple Note

[App page](https://appshunter.io/ios/app/simple-note-fast-notepad/id6813719808)

**In-app purchases:** none


## Frequently asked questions

### Is OneCalc free?

OneCalc is free to download, with no in-app purchases.

### Is Simple Note free?

Simple Note costs $0.99, with no in-app purchases.

### Do OneCalc or Simple Note have ads?

OneCalc shows ads; Simple Note does not.

### Which is updated more often, OneCalc or Simple Note?

OneCalc ships an update every 3 months, and Simple Note every 8 days. Most recently, OneCalc was updated on November 2, 2026 and Simple Note on October 31, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*