# Device MI vs NHS31xx Therapy Adherence

The clearest difference is update cadence: Device MI at every 2 days against NHS31xx Therapy Adherence's every 18 months. Device MI also leads on iOS requirement (9.0 vs 13.0). 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.

Device MI ships an update every 2 days, NHS31xx Therapy Adherence every 18 months. The most recent releases landed on November 2, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | Device MI | NHS31xx Therapy Adherence |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 days** | Every 18 months |
| Size | 14 MB | 43 MB |
| Requires iOS | **9.0** | 13.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [FutureDial Inc.](https://appshunter.io/developer/1163960008) | [NXP Semiconductors](https://appshunter.io/developer/383827086) |

## What reviewers say

### Device MI

[App page](https://appshunter.io/ios/app/device-mi/id1193612155)

**Features:** macOS Compatibility

**In-app purchases:** none


### NHS31xx Therapy Adherence

[App page](https://appshunter.io/ios/app/nhs31xx-therapy-adherence/id1534326792)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Device MI free?

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

### Is NHS31xx Therapy Adherence free?

NHS31xx Therapy Adherence is free to download, with no in-app purchases.

### Do Device MI or NHS31xx Therapy Adherence have ads?

Neither Device MI nor NHS31xx Therapy Adherence shows ads.

### Which is updated more often, Device MI or NHS31xx Therapy Adherence?

Device MI ships an update every 2 days, and NHS31xx Therapy Adherence every 18 months. Most recently, Device MI was updated on November 2, 2026 and NHS31xx Therapy Adherence on October 27, 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.*