# multiple operation calculator vs Proof Recorder

The clearest difference is iOS requirement: multiple operation calculator at 15.8.3 against Proof Recorder's 18.0. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

multiple operation calculator ships an update every 2 weeks, Proof Recorder every 10 days. The most recent releases landed on September 15, 2026 and August 5, 2026 respectively.

## The numbers

| Metric | multiple operation calculator | Proof Recorder |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | Yes | Yes |
| Update frequency | Every 2 weeks | **Every 10 days** |
| Size | 35 MB | 12 MB |
| Requires iOS | **15.8.3** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Hideaki Uchikoshi](https://appshunter.io/developer/1559575002) | [Saturn Studio](https://appshunter.io/developer/1491356325) |

## What reviewers say

### multiple operation calculator

[App page](https://appshunter.io/ios/app/multiple-operation-calculator/id6499478564)

**Features:** macOS Compatibility

**In-app purchases:** none


### Proof Recorder

[App page](https://appshunter.io/ios/app/proof-recorder-save-and-email/id6761300996)

**In-app purchases:** none


## Frequently asked questions

### Is multiple operation calculator free?

multiple operation calculator is free to download, with no in-app purchases.

### Is Proof Recorder free?

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

### Do multiple operation calculator or Proof Recorder have ads?

Both multiple operation calculator and Proof Recorder show ads.

### Which is updated more often, multiple operation calculator or Proof Recorder?

multiple operation calculator ships an update every 2 weeks, and Proof Recorder every 10 days. Most recently, multiple operation calculator was updated on September 15, 2026 and Proof Recorder on August 5, 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.*