# Sleep Cycle Calculator vs WeightTracker

The clearest difference is update cadence: WeightTracker at every 4 weeks against Sleep Cycle Calculator's every 2 months. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Sleep Cycle Calculator sells 4 in-app purchases, starting at $2.99 per 7 days and WeightTracker sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Sleep Cycle Calculator ships an update every 2 months, WeightTracker every 4 weeks. The most recent releases landed on October 31, 2026 and November 10, 2026 respectively.

## The numbers

| Metric | Sleep Cycle Calculator | WeightTracker |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 4 weeks** |
| Size | 45 MB | 24 MB |
| Requires iOS | **17.0** | 18.6 |
| Devices | iPhone | **iPhone, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [Vasilii Polovnikov](https://appshunter.io/developer/1716165883) | [Ethan Milton Wilde](https://appshunter.io/developer/1892997468) |

## What reviewers say

### Sleep Cycle Calculator

[App page](https://appshunter.io/ios/app/sleep-cycle-calculator-bedti/id6772567893)

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium · 1 week | $2.99 | per 7 days |
| Premium · 1 month | $3.99 | per month |
| Premium · 1 year | $5.99 | per year |
| Premium · Lifetime | $7.99 | one-time |


### WeightTracker

[App page](https://appshunter.io/ios/app/weighttracker-lifetracker/id6789826994)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| WeightTracker Pro | $0.99 | one-time |


## Frequently asked questions

### Is Sleep Cycle Calculator free?

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

### Is WeightTracker free?

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

### Do Sleep Cycle Calculator or WeightTracker have ads?

Neither Sleep Cycle Calculator nor WeightTracker shows ads.

### Which is updated more often, Sleep Cycle Calculator or WeightTracker?

Sleep Cycle Calculator ships an update every 2 months, and WeightTracker every 4 weeks. Most recently, Sleep Cycle Calculator was updated on October 31, 2026 and WeightTracker on November 10, 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.*