# STF Sleep Research vs ProX1Lite

The clearest difference is iOS requirement: STF Sleep Research at 10.0 against ProX1Lite's 13.0. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Both ship on a similar rhythm, roughly every 5 weeks. The most recent releases landed on October 25, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | STF Sleep Research | ProX1Lite |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.3 (3 ratings)](https://appshunter.io/ios/app/stf-sleep-research/id1345157553/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 weeks | Every 5 weeks |
| Monetization | Free | — |
| Size | 117 MB | 80 MB |
| Requires iOS | **10.0** | 13.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Zepp Inc.](https://appshunter.io/developer/938688460) | [润葵 叶](https://appshunter.io/developer/1581973824) |

## What reviewers say

### STF Sleep Research

[App page](https://appshunter.io/ios/app/stf-sleep-research/id1345157553)

This utility app synchronizes health data from wearable devices to Apple Health. It assists researchers in studying sleep sciences by collecting steps, sleep, and heart rate information. Authorization is required to enable data syncing.

**Highlights:** Track paired wearing equipment data, Sync steps, sleep, and heart rate, Integrates with Apple Health, Supports sleep science research, Concise and straightforward interface

**Features:** macOS Compatibility

**In-app purchases:** none


### ProX1Lite

[App page](https://appshunter.io/ios/app/prox1lite/id6742864427)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is STF Sleep Research free?

STF Sleep Research is free to download, with no in-app purchases.

### Is ProX1Lite free?

ProX1Lite is free to download, with no in-app purchases.

### Do STF Sleep Research or ProX1Lite have ads?

Neither STF Sleep Research nor ProX1Lite shows ads.

### Which is updated more often, STF Sleep Research or ProX1Lite?

STF Sleep Research ships an update every 5 weeks, and ProX1Lite every 5 weeks. Most recently, STF Sleep Research was updated on October 25, 2026 and ProX1Lite 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.*