# BLK BOX vs Sleep Tracker

The clearest difference is in-app purchases: BLK BOX at none against Sleep Tracker's 2. Sleep Tracker's advantage is update cadence (every 5 weeks vs every 7 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Sleep Tracker sells 2 in-app purchases, starting at $4.99 per month. BLK BOX asks for nothing beyond the download.

BLK BOX ships an update every 7 months, Sleep Tracker every 5 weeks. The most recent releases landed on October 30, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | BLK BOX | Sleep Tracker |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (43 ratings)](https://appshunter.io/ios/app/blk-box/id6753706320/reviews)** | — |
| Number of ratings | **43** | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 5 weeks** |
| Monetization | Free | — |
| Size | 55 MB | 47 MB |
| Requires iOS | **14.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [TeamUp Sports](https://appshunter.io/developer/1449504626) | [Ramazan Erikli](https://appshunter.io/developer/1789625854) |

## What reviewers say

### BLK BOX

[App page](https://appshunter.io/ios/app/blk-box/id6753706320)

Manage your health and fitness journey with this app. Book classes, create custom workout plans, and track your physical progress. Connect with other members and stay updated on club news and offers.

**Highlights:** Book classes online, Create custom exercise programs, Track workout progress, Monitor body measurements, Direct contact with club staff, Community interaction, HealthKit integration

**Features:** macOS Compatibility

**In-app purchases:** none


### Sleep Tracker

[App page](https://appshunter.io/ios/app/sleep-tracker-sleep-diary/id6766016682)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Sleep Tracker Premium (Monthly) | $4.99 | per month |
| Sleep Tracker Premium (Yearly) | $39.99 | per year |


## Frequently asked questions

### Is BLK BOX free?

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

### Is Sleep Tracker free?

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

### Do BLK BOX or Sleep Tracker have ads?

Neither BLK BOX nor Sleep Tracker shows ads.

### Which is updated more often, BLK BOX or Sleep Tracker?

BLK BOX ships an update every 7 months, and Sleep Tracker every 5 weeks. Most recently, BLK BOX was updated on October 30, 2026 and Sleep Tracker on October 13, 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.*