# 電卓&ストップウォッチ vs Jumpstash

The clearest difference is ads: Jumpstash at none against 電卓&ストップウォッチ's shown. Jumpstash also leads on update cadence (every 2 weeks vs every 19 months) and monetization model (free vs ad-supported). 電卓&ストップウォッチ's advantage is iOS requirement (13.0 vs 16.6). On price, review sentiment 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.

電卓&ストップウォッチ ships an update every 19 months, Jumpstash every 2 weeks. The most recent releases landed on September 8, 2026 and September 14, 2026 respectively.

## The numbers

| Metric | 電卓&ストップウォッチ | Jumpstash |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.2 (5 ratings)](https://appshunter.io/ios/app/jumpstash/id1465670860/reviews)** |
| Number of ratings | — | **5** |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 19 months | **Every 2 weeks** |
| Monetization | Ad-supported | **Free** |
| Size | 19 MB | 17 MB |
| Requires iOS | **13.0** | 16.6 |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Mac, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [Ametiar](https://appshunter.io/developer/1465452317) | [Michael Mackintosh II](https://appshunter.io/developer/1281426136) |

## What reviewers say

### 電卓&ストップウォッチ

[App page](https://appshunter.io/ios/app/and/id1465452318)

This app combines a stopwatch, numerical counter, and calculator into a single, easy-to-use interface. It allows for simultaneous operation of all three tools, simplifying daily tasks.

**Highlights:** Simultaneous operation, Stopwatch, Numerical counter, Calculator, Simple interface

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

**In-app purchases:** none


### Jumpstash

[App page](https://appshunter.io/ios/app/jumpstash/id1465670860)

Securely store backup codes for your accounts in iCloud Keychain. Access them from any device logged into iCloud, ensuring you never lose access to your important services.

**Highlights:** Secure backup code storage, iCloud Keychain integration, Cross-device access, Account lockout prevention, Token generation backup

**In-app purchases:** none


## Frequently asked questions

### Is 電卓&ストップウォッチ free?

電卓&ストップウォッチ is free to download, with no in-app purchases.

### Is Jumpstash free?

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

### Do 電卓&ストップウォッチ or Jumpstash have ads?

電卓&ストップウォッチ shows ads; Jumpstash does not.

### Which is updated more often, 電卓&ストップウォッチ or Jumpstash?

電卓&ストップウォッチ ships an update every 19 months, and Jumpstash every 2 weeks. Most recently, 電卓&ストップウォッチ was updated on September 8, 2026 and Jumpstash on September 14, 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.*