# Calculator Sharp vs Must Ring

The clearest difference is in-app purchases: Calculator Sharp at none against Must Ring's 1. Calculator Sharp also leads on device support (3 vs 1) and iOS requirement (12.0 vs 26.1). Must Ring's advantage is ads (none vs shown) and update cadence (fortnightly vs every 5 months). On price there is nothing between them.

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

Calculator Sharp ships an update every 5 months, Must Ring fortnightly. The most recent releases landed on November 6, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Calculator Sharp | Must Ring |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (5 ratings)](https://appshunter.io/ios/app/calculator-sharp/id882461576/reviews)** | — |
| Number of ratings | **5** | — |
| Positive reviews | 93.8% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 5 months | **Fortnightly** |
| Monetization | Ad-supported | — |
| Size | 31 MB | 12 MB |
| Requires iOS | **12.0** | 26.1 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [锦文 游](https://appshunter.io/developer/406832160) | [大胜 纪](https://appshunter.io/developer/320513564) |

## What reviewers say

### Calculator Sharp

[App page](https://appshunter.io/ios/app/calculator-sharp/id882461576)

This calculator app offers ultra-high precision with up to 37 digits of accuracy. It supports a wide range of complex mathematical functions, including trigonometric, logarithmic, and integral operations, along with step-by-step calculation display and undo/redo functionality.

**Highlights:** Ultra-high precision (37 digits), Supports complex mathematical operations, Displays calculation steps, Undo and redo functionality, Multiple number base conversions, WYSIWYG interface

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

**In-app purchases:** none


### Must Ring

[App page](https://appshunter.io/ios/app/must-ring/id6812251518)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Must Ring Unlock | $14.99 | one-time |


## Frequently asked questions

### Is Calculator Sharp free?

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

### Is Must Ring free?

Must Ring is free to download, with in-app purchases available.

### Do Calculator Sharp or Must Ring have ads?

Calculator Sharp shows ads; Must Ring does not.

### Which is updated more often, Calculator Sharp or Must Ring?

Calculator Sharp ships an update every 5 months, and Must Ring fortnightly. Most recently, Calculator Sharp was updated on November 6, 2026 and Must Ring on October 31, 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.*