# TimeLooker vs SleepDiary

The clearest difference is update cadence: SleepDiary at every 5 days against TimeLooker's every 3 weeks. SleepDiary also leads on device support (3 vs 1). On price, ads, in-app purchases and iOS requirement there is nothing between them.

Both are free to download. TimeLooker sells 2 in-app purchases, starting at $4.99 per month and SleepDiary sells 3 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.

TimeLooker ships an update every 3 weeks, SleepDiary every 5 days. The most recent releases landed on September 18, 2026 and June 28, 2026 respectively.

## The numbers

| Metric | TimeLooker | SleepDiary |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 5 days** |
| Size | 7 MB | 4 MB |
| Requires iOS | **17.0** | 18.6 |
| Devices | iPhone | **iPhone, iPad, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [Hayashida Yoshiaki](https://appshunter.io/developer/1608631143) | [璐 王](https://appshunter.io/developer/1884213493) |

## What reviewers say

### TimeLooker

[App page](https://appshunter.io/ios/app/timelooker/id6444372044)

**Features:** macOS Compatibility, Family Sharing

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 月間有料プラン | $4.99 | per month |
| 年間有料会員プラン | $29.99 | per year |


### SleepDiary

[App page](https://appshunter.io/ios/app/sleepdiary/id6760534533)

**Features:** macOS Compatibility, Apple Watch app

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 睡眠声音日记 Pro | $0.99 | per month |
| 睡眠声音日记 Pro | $4.99 | per year |
| 睡眠日记 Pro | $9.99 | one-time |


## Frequently asked questions

### Is TimeLooker free?

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

### Is SleepDiary free?

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

### Do TimeLooker or SleepDiary have ads?

Neither TimeLooker nor SleepDiary shows ads.

### Which is updated more often, TimeLooker or SleepDiary?

TimeLooker ships an update every 3 weeks, and SleepDiary every 5 days. Most recently, TimeLooker was updated on September 18, 2026 and SleepDiary on June 28, 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.*