# TOOL plus (Pro) ¶ vs STF Sleep Research

The clearest difference is update cadence: TOOL plus (Pro) ¶ at every 2 days against STF Sleep Research's every 5 weeks. STF Sleep Research's advantage is iOS requirement (10.0 vs 15.6). On price, ads, in-app purchases and device support there is nothing between them.

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

TOOL plus (Pro) ¶ ships an update every 2 days, STF Sleep Research every 5 weeks. The most recent releases landed on October 4, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | TOOL plus (Pro) ¶ | STF Sleep Research |
| --- | --- | --- |
| 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 2 days** | Every 5 weeks |
| Monetization | — | Free |
| Size | 111 MB | 117 MB |
| Requires iOS | 15.6 | **10.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Han-Chung Lin](https://appshunter.io/developer/881528252) | [Zepp Inc.](https://appshunter.io/developer/938688460) |

## What reviewers say

### TOOL plus (Pro) ¶

[App page](https://appshunter.io/ios/app/tool-plus-pro/id972381990)

**Features:** macOS Compatibility

**In-app purchases:** none


### 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


## Frequently asked questions

### Is TOOL plus (Pro) ¶ free?

TOOL plus (Pro) ¶ is free to download, with no in-app purchases.

### Is STF Sleep Research free?

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

### Do TOOL plus (Pro) ¶ or STF Sleep Research have ads?

Neither TOOL plus (Pro) ¶ nor STF Sleep Research shows ads.

### Which is updated more often, TOOL plus (Pro) ¶ or STF Sleep Research?

TOOL plus (Pro) ¶ ships an update every 2 days, and STF Sleep Research every 5 weeks. Most recently, TOOL plus (Pro) ¶ was updated on October 4, 2026 and STF Sleep Research on October 3, 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.*