# 时区转换器 vs KeepOnFirst

The clearest difference is in-app purchases: 时区转换器 at none against KeepOnFirst's 3. 时区转换器 also leads on ads (none vs shown). On price, device support and iOS requirement there is nothing between them.

Both are free to download. KeepOnFirst sells 3 in-app purchases, starting at $0.99 per month. 时区转换器 asks for nothing beyond the download.

## The numbers

| Metric | 时区转换器 | KeepOnFirst |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | — | Weekly |
| Size | 2 MB | 18 MB |
| Requires iOS | **16.4** | 17.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [士博 齐](https://appshunter.io/developer/1516443014) | [yu te Lin](https://appshunter.io/developer/1857651876) |

## What reviewers say

### 时区转换器

[App page](https://appshunter.io/ios/app/id6742240646)

**Features:** macOS Compatibility

**In-app purchases:** none


### KeepOnFirst

[App page](https://appshunter.io/ios/app/keeponfirst-pomodoro-timer/id6756566953)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pomodoro Pro Monthly | $0.99 | per month |
| Pomodoro Pro Yearly | $5.99 | per year |
| Pomodoro Pro Lifetime | $11.99 | one-time |


## Frequently asked questions

### Is 时区转换器 free?

时区转换器 is free to download, with no in-app purchases.

### Is KeepOnFirst free?

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

### Do 时区转换器 or KeepOnFirst have ads?

KeepOnFirst shows ads; 时区转换器 does not.

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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.*