# multiple operation calculator vs Stopwatch Library

The clearest difference is in-app purchases: multiple operation calculator at none against Stopwatch Library's 1. multiple operation calculator also leads on iOS requirement (15.8.3 vs 17.0). Stopwatch Library's advantage is ads (none vs shown) and update cadence (every 3 days vs every 2 weeks). On price and device support there is nothing between them.

Both are free to download. Stopwatch Library sells 1 one-off in-app purchase. multiple operation calculator asks for nothing beyond the download.

multiple operation calculator ships an update every 2 weeks, Stopwatch Library every 3 days. The most recent releases landed on October 2, 2026 and September 28, 2026 respectively.

## The numbers

| Metric | multiple operation calculator | Stopwatch Library |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 2 weeks | **Every 3 days** |
| Size | 35 MB | 5 MB |
| Requires iOS | **15.8.3** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Hideaki Uchikoshi](https://appshunter.io/developer/1559575002) | [Naoyuki Hasegawa](https://appshunter.io/developer/6777422704) |

## What reviewers say

### multiple operation calculator

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

**Features:** macOS Compatibility

**In-app purchases:** none


### Stopwatch Library

[App page](https://appshunter.io/ios/app/stopwatch-library/id6794338987)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 広告を削除 | $2.99 | one-time |


## Frequently asked questions

### Is multiple operation calculator free?

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

### Is Stopwatch Library free?

Stopwatch Library is free to download, with in-app purchases available.

### Do multiple operation calculator or Stopwatch Library have ads?

multiple operation calculator shows ads; Stopwatch Library does not.

### Which is updated more often, multiple operation calculator or Stopwatch Library?

multiple operation calculator ships an update every 2 weeks, and Stopwatch Library every 3 days. Most recently, multiple operation calculator was updated on October 2, 2026 and Stopwatch Library on September 28, 2026.

---

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