# Calculator for All vs OKOterm

The clearest difference is in-app purchases: OKOterm at none against Calculator for All's 1. OKOterm also leads on update cadence (every 4 days vs every 4 weeks). Calculator for All's advantage is device support (5 vs 3). On price, ads and iOS requirement there is nothing between them.

Both are free to download. Calculator for All sells 1 one-off in-app purchase. OKOterm asks for nothing beyond the download.

Calculator for All ships an update every 4 weeks, OKOterm every 4 days. The most recent releases landed on November 2, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | Calculator for All | OKOterm |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (385 ratings)](https://appshunter.io/ios/app/calculator-for-all-solves/id1394359548/reviews)** | — |
| Number of ratings | **385** | — |
| Positive reviews | 90.6% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 4 weeks | **Every 4 days** |
| Monetization | Free with in-app purchases | — |
| Size | 83 MB | 17 MB |
| Requires iOS | 15 | **14.0** |
| Devices | **iPhone, iPad, iPod, Mac, Apple Watch** | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Oleg Barinov](https://appshunter.io/developer/1394359547) | [Artem Shitik](https://appshunter.io/developer/1552015418) |

## What reviewers say

### Calculator for All

[App page](https://appshunter.io/ios/app/calculator-for-all-solves/id1394359548)

A powerful and versatile calculator for all your Apple devices. Edit complex expressions, sync history across devices, and enjoy a clean, ad-free experience. Unlock advanced features like unit conversion and fraction support with an optional upgrade.

**Highlights:** Edit expressions without limitations, Instant results, Sync calculation history across devices, Unit conversion (currencies, physical units), Fraction support, Customizable themes

**Features:** Family Sharing, Apple Watch app, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Solves+ | $9.99 | one-time |

**What reviewers like**

- 👍 Excellent calculator app
- 🚀 Smooth and responsive
- 🔒 No ads or data collection
- 💡 Useful features like history, comments, and unit conversions
- 👍 Clean and intuitive design

**What reviewers complain about**

- 🐛 Occasional crashes or bugs after updates
- 🐛 Issues with certain mathematical operations
- 🐛 Family sharing not working properly
- 🐛 Lag or performance issues on some devices
- 💡 Desire for more advanced features like fractions, base conversions

**Reported bugs**

- Crashes when pressing certain buttons
- Issues with parsing complex expressions
- Incorrect results for some calculations
- Problems with history clearing or syncing

**Requested features**

- Add support for fractions and mixed numbers
- Implement a widget for quick access
- Allow resizing the app window on Mac
- Provide more customization options
- Add support for Apple Watch


### OKOterm

[App page](https://appshunter.io/ios/app/okoterm/id1565744849)

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

**In-app purchases:** none


## Frequently asked questions

### Is Calculator for All free?

Calculator for All is free to download, with in-app purchases available.

### Is OKOterm free?

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

### Do Calculator for All or OKOterm have ads?

Neither Calculator for All nor OKOterm shows ads.

### Which is updated more often, Calculator for All or OKOterm?

Calculator for All ships an update every 4 weeks, and OKOterm every 4 days. Most recently, Calculator for All was updated on November 2, 2026 and OKOterm on October 27, 2026.

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