# HAND in Hand Mobile Study vs MIR SMART ONE

The clearest difference is rating: HAND in Hand Mobile Study at 4.0 against MIR SMART ONE's 2.8. HAND in Hand Mobile Study also leads on review sentiment (50% vs 25%). MIR SMART ONE's advantage is ratings volume (22 vs 3). 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.

HAND in Hand Mobile Study holds the better App Store score, 4.0 against 2.8. That said, the two scores are not equally well evidenced: MIR SMART ONE has 22 ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 50% of HAND in Hand Mobile Study's written reviews are positive against 25% of MIR SMART ONE's.

HAND in Hand Mobile Study ships an update every 3 months, MIR SMART ONE every 4 months. The most recent releases landed on October 6, 2026 and October 20, 2026 respectively.

## The numbers

| Metric | HAND in Hand Mobile Study | MIR SMART ONE |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (3 ratings)](https://appshunter.io/ios/app/hand-in-hand-mobile-study/id1005617953/reviews)** | [2.8 (22 ratings)](https://appshunter.io/ios/app/mir-smart-one/id1010664940/reviews) |
| Number of ratings | 3 | **22** |
| Positive reviews | **50.0% of reviews** | 25.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 4 months |
| Monetization | Free | Free |
| Size | 55 MB | 22 MB |
| Requires iOS | **11.4** | 12.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 17+ | 17+ |
| Developer | [Digital Artefacts L.L.C.](https://appshunter.io/developer/546444556) | [MIR Medical International Research](https://appshunter.io/developer/1010662698) |

## What reviewers say

### HAND in Hand Mobile Study

[App page](https://appshunter.io/ios/app/hand-in-hand-mobile-study/id1005617953)

Participate in a medical research study on HIV Associated Neurocognitive Disorders (HAND). Track cognitive function, complete surveys, and share health data to advance research and understand potential impacts on neurocognitive health.

**Highlights:** Medical research participation, HIV neurocognitive disorder study, Cognitive function tracking, Health data integration, Weekly assessments, Demographic and lifestyle surveys

**In-app purchases:** none


### MIR SMART ONE

[App page](https://appshunter.io/ios/app/mir-smart-one/id1010664940)

This app works with a connected device to measure respiratory function, including FEV1 and PEF. It provides real-time feedback with a traffic light system and stores results for easy tracking and sharing. Personal health data is used solely for calculating target values.

**Highlights:** Bluetooth Peak Flow and FEV1 measurement, Real-time data transfer and animation, Traffic light health indicator, Automatic test result storage, Symptom and note logging, PDF report generation for sharing, Apple Health integration

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is HAND in Hand Mobile Study free?

HAND in Hand Mobile Study is free to download, with no in-app purchases.

### Is MIR SMART ONE free?

MIR SMART ONE is free to download, with no in-app purchases.

### Which has better reviews, HAND in Hand Mobile Study or MIR SMART ONE?

HAND in Hand Mobile Study is rated higher. HAND in Hand Mobile Study averages 4.0 out of 5 from 3 ratings, while MIR SMART ONE averages 2.8 from 22 ratings.

### Do HAND in Hand Mobile Study or MIR SMART ONE have ads?

Neither HAND in Hand Mobile Study nor MIR SMART ONE shows ads.

### Which is updated more often, HAND in Hand Mobile Study or MIR SMART ONE?

HAND in Hand Mobile Study ships an update every 3 months, and MIR SMART ONE every 4 months. Most recently, HAND in Hand Mobile Study was updated on October 6, 2026 and MIR SMART ONE on October 20, 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.*