# Morfify Sleep vs Calorie Burndown

The clearest difference is update cadence: Calorie Burndown at every 3 days against Morfify Sleep's every 9 days. Morfify Sleep's advantage is iOS requirement (16.6 vs 26.5). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Morfify Sleep sells 2 in-app purchases, starting at $9.99 per month and Calorie Burndown sells 3 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Morfify Sleep ships an update every 9 days, Calorie Burndown every 3 days. The most recent releases landed on October 25, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Morfify Sleep | Calorie Burndown |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 9 days | **Every 3 days** |
| Size | 14 MB | 6 MB |
| Requires iOS | **16.6** | 26.5 |
| Devices | iPhone, Apple Watch | **iPhone, iPad, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [Henrik Rytter Jensen](https://appshunter.io/developer/1895180419) | [Kevin McMahon](https://appshunter.io/developer/6783589762) |

## What reviewers say

### Morfify Sleep

[App page](https://appshunter.io/ios/app/morfify-sleep/id6763139923)

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Morfify Premium Monthly | $9.99 | per month |
| Morfify Premium Annual | $59.99 | per year |


### Calorie Burndown

[App page](https://appshunter.io/ios/app/calorie-burndown/id6800660426)

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Buy me a coffee | $1.99 | one-time |
| Buy me a few coffees | $4.99 | one-time |
| Buy the whole round | $9.99 | one-time |


## Frequently asked questions

### Is Morfify Sleep free?

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

### Is Calorie Burndown free?

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

### Do Morfify Sleep or Calorie Burndown have ads?

Neither Morfify Sleep nor Calorie Burndown shows ads.

### Which is updated more often, Morfify Sleep or Calorie Burndown?

Morfify Sleep ships an update every 9 days, and Calorie Burndown every 3 days. Most recently, Morfify Sleep was updated on October 25, 2026 and Calorie Burndown on October 24, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*