# Timeshifter Shift Work vs SleepSync

The clearest difference is in-app purchases: SleepSync at none against Timeshifter Shift Work's 2. Timeshifter Shift Work's advantage is ads (none vs shown) and rating (4.0 vs 3.7). On price, device support and iOS requirement there is nothing between them.

Both are free to download. Timeshifter Shift Work sells 2 in-app purchases, starting at $6.99 per month. SleepSync asks for nothing beyond the download.

Timeshifter Shift Work holds the better App Store score, 4.0 against 3.7. That said, the two scores are not equally well evidenced: Timeshifter Shift Work has 21 ratings behind it against 3, so its average is the more settled of the two.

## The numbers

| Metric | Timeshifter Shift Work | SleepSync |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (21 ratings)](https://appshunter.io/ios/app/timeshifter-shift-work/id1594538527/reviews)** | [3.7 (3 ratings)](https://appshunter.io/ios/app/sleepsync-sleep-calculator/id6479617244/reviews) |
| Number of ratings | **21** | 3 |
| Positive reviews | 51.7% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | Every 3 weeks | — |
| Monetization | Free with in-app purchases | **Ad-supported** |
| Size | 65 MB | 10 MB |
| Requires iOS | 17.2 | **16.0** |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Timeshifter Inc.](https://appshunter.io/developer/1380684373) | [APPS BAY LIMITED](https://appshunter.io/developer/1599035519) |

## What reviewers say

### Timeshifter Shift Work

[App page](https://appshunter.io/ios/app/timeshifter-shift-work/id1594538527)

Optimize your sleep and energy levels with science-based guidance tailored for shift workers. This app provides personalized advice to combat circadian disruption, improving performance, health, and quality of life. It replaces common myths with evidence-based interventions to reset your internal clock.

**Highlights:** Personalized circadian clock advice, Practical real-world adjustments, Quick shift schedule entry, Commute and preparation time inclusion, Fatigue prediction alerts, Timely advice notifications

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Shiftwork | $6.99 | per month |
| Shiftwork | $69.99 | per year |


### SleepSync

[App page](https://appshunter.io/ios/app/sleepsync-sleep-calculator/id6479617244)

Optimize your sleep cycles to wake up feeling refreshed. This app calculates your ideal bedtime and wake-up time based on sleep science, offering insights into deep sleep and REM stages. Enjoy a user-friendly interface designed for a better night's rest.

**Highlights:** Personalized sleep schedule, Deep sleep and REM analysis, Intuitive sleep calculator, Advanced sleep cycle tracking, User-friendly interface, Privacy focused

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

**In-app purchases:** none


## Frequently asked questions

### Is Timeshifter Shift Work free?

Timeshifter Shift Work is free to download, with in-app purchases available.

### Is SleepSync free?

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

### Which has better reviews, Timeshifter Shift Work or SleepSync?

Timeshifter Shift Work is rated higher. Timeshifter Shift Work averages 4.0 out of 5 from 21 ratings, while SleepSync averages 3.7 from 3 ratings.

### Do Timeshifter Shift Work or SleepSync have ads?

SleepSync shows ads; Timeshifter Shift Work 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.*