# Sleep Data Recorder vs ZYGON | Mind Spa

The clearest difference is in-app purchases: ZYGON | Mind Spa at none against Sleep Data Recorder's 1. ZYGON | Mind Spa also leads on update cadence (every 4 days vs every 6 weeks). Sleep Data Recorder's advantage is iOS requirement (9.0 vs 12.3). On price, ads and device support there is nothing between them.

Both are free to download. Sleep Data Recorder sells 1 one-off in-app purchase. ZYGON | Mind Spa asks for nothing beyond the download.

Sleep Data Recorder ships an update every 6 weeks, ZYGON | Mind Spa every 4 days. The most recent releases landed on October 3, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | Sleep Data Recorder | ZYGON | Mind Spa |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.5 (2 ratings)](https://appshunter.io/ios/app/sleep-data-recorder/id1135221863/reviews)** | — |
| Number of ratings | **2** | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Every 4 days** |
| Monetization | Free with in-app purchases | — |
| Size | 2 MB | 65 MB |
| Requires iOS | **9.0** | 12.3 |
| Devices | iPhone, iPod, Apple Watch | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [JOHN BURKE](https://appshunter.io/developer/1082153101) | [dane spotts](https://appshunter.io/developer/1576900019) |

## What reviewers say

### Sleep Data Recorder

[App page](https://appshunter.io/ios/app/sleep-data-recorder/id1135221863)

Effortlessly track your sleep patterns and daily body weight by logging your bedtime and wake-up times. The app automatically calculates your time in bed and asleep, and syncs data with Apple's HealthKit for easy monitoring of your health progress.

**Highlights:** Sleep pattern monitoring, Body weight logging, Automatic time calculation, HealthKit integration, Simple one-button entry

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weight Recorder Full Access | $0.99 | one-time |


### ZYGON | Mind Spa

[App page](https://appshunter.io/ios/app/zygon-mind-spa/id6737984304)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Sleep Data Recorder free?

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

### Is ZYGON | Mind Spa free?

ZYGON | Mind Spa is free to download, with no in-app purchases.

### Do Sleep Data Recorder or ZYGON | Mind Spa have ads?

Neither Sleep Data Recorder nor ZYGON | Mind Spa shows ads.

### Which is updated more often, Sleep Data Recorder or ZYGON | Mind Spa?

Sleep Data Recorder ships an update every 6 weeks, and ZYGON | Mind Spa every 4 days. Most recently, Sleep Data Recorder was updated on October 3, 2026 and ZYGON | Mind Spa on October 5, 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.*