# 15min Change Timer vs Calculator H

The clearest difference is in-app purchases: 15min Change Timer at none against Calculator H's 5. Calculator H's advantage is device support (3 vs 1) and iOS requirement (15.6 vs 17.0). On price and ads there is nothing between them.

Both are free to download. Calculator H sells 3 in-app purchases, starting at $2.99 per year. 15min Change Timer asks for nothing beyond the download.

## The numbers

| Metric | 15min Change Timer | Calculator H |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.9 (28 ratings)](https://appshunter.io/ios/app/calculator-h/id6760459201/reviews)** |
| Number of ratings | — | **28** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | — | Weekly |
| Monetization | — | Free |
| Size | 1 MB | 47 MB |
| Requires iOS | 17.0 | **15.6** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Hiroki Muranaka](https://appshunter.io/developer/1882707973) | [Chengdu Cold Technology Co., Ltd](https://appshunter.io/developer/1873882906) |

## What reviewers say

### 15min Change Timer

[App page](https://appshunter.io/ios/app/15min-change-timer/id6760115037)

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

**In-app purchases:** none


### Calculator H

[App page](https://appshunter.io/ios/app/calculator-h/id6760459201)

This app offers a robust calculator with history and editable equations. It includes specialized calculators for mortgage calculations, interest rates, and currency conversions with real-time updates.

**Highlights:** Editable calculation history, Mortgage calculator (fixed, LPR, provident fund), Interest rate comparison, Currency converter with real-time rates, Save and compare mortgage data

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 一年会员 | $2.99 | per year |
| 打赏 | $0.99 | one-time |
| 打赏 | $1.99 | one-time |


## Frequently asked questions

### Is 15min Change Timer free?

15min Change Timer is free to download, with no in-app purchases.

### Is Calculator H free?

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

### Do 15min Change Timer or Calculator H have ads?

Neither 15min Change Timer nor Calculator H shows ads.

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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.*