# STF Sleep Research vs DialAI

The clearest difference is in-app purchases: STF Sleep Research at none against DialAI's 2. STF Sleep Research also leads on iOS requirement (10.0 vs 13.0). On price, ads and device support there is nothing between them.

Both are free to download. DialAI sells 2 in-app purchases, starting at $0.99 per month. STF Sleep Research asks for nothing beyond the download.

## The numbers

| Metric | STF Sleep Research | DialAI |
| --- | --- | --- |
| 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** | Yes |
| Ads | No | No |
| Update frequency | Every 5 weeks | — |
| Monetization | Free | — |
| Size | 117 MB | 3 MB |
| Requires iOS | **10.0** | 13.0 |
| Devices | iPhone, iPod | **iPhone, iPod, Apple Watch** |
| Age rating | 4+ | 17+ |
| Developer | [Zepp Inc.](https://appshunter.io/developer/938688460) | [Nikita Ivanov](https://appshunter.io/developer/1718004519) |

## 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


### DialAI

[App page](https://appshunter.io/ios/app/dialai/id6473126163)

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Basic | $0.99 | per month |
| Premium | $3.99 | per month |


## Frequently asked questions

### Is STF Sleep Research free?

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

### Is DialAI free?

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

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

Neither STF Sleep Research nor DialAI shows ads.

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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.*