# Fitburn vs Celestial Sleep

The clearest difference is in-app purchases: Fitburn at none against Celestial Sleep's 3. Fitburn also leads on update cadence (every 3 days vs fortnightly). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Celestial Sleep sells 3 one-off in-app purchases. Fitburn asks for nothing beyond the download.

Fitburn ships an update every 3 days, Celestial Sleep fortnightly. The most recent releases landed on October 21, 2026 and October 18, 2026 respectively.

## The numbers

| Metric | Fitburn | Celestial Sleep |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 3 days** | Fortnightly |
| Size | 290 MB | 32 MB |
| Requires iOS | **14.2** | 15.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [German Capital Intelligence FZCO](https://appshunter.io/developer/1697837420) | [Celestial, Inc.](https://appshunter.io/developer/1733197371) |

## What reviewers say

### Fitburn

[App page](https://appshunter.io/ios/app/fitburn/id6454192037)

**Features:** macOS Compatibility

**In-app purchases:** none


### Celestial Sleep

[App page](https://appshunter.io/ios/app/celestial-sleep/id6478527941)

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Guardian (Month) | $0.99 | one-time |
| Guardian (Quarter) | $1.99 | one-time |
| Guardian (Year) | $9.99 | one-time |


## Frequently asked questions

### Is Fitburn free?

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

### Is Celestial Sleep free?

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

### Do Fitburn or Celestial Sleep have ads?

Neither Fitburn nor Celestial Sleep shows ads.

### Which is updated more often, Fitburn or Celestial Sleep?

Fitburn ships an update every 3 days, and Celestial Sleep fortnightly. Most recently, Fitburn was updated on October 21, 2026 and Celestial Sleep on October 18, 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.*