# M vs Drive Sentinel

The clearest difference is in-app purchases: M at none against Drive Sentinel's 1. M also leads on iOS requirement (15.0 vs 17.0). Drive Sentinel's advantage is update cadence (every 9 days vs every 2 months). On price, ads and device support there is nothing between them.

Both are free to download. Drive Sentinel sells 1 one-off in-app purchase. M asks for nothing beyond the download.

M ships an update every 2 months, Drive Sentinel every 9 days. The most recent releases landed on October 3, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | M | Drive Sentinel |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 9 days** |
| Size | 24 MB | 5 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | iPhone, iPod | iPhone, Apple Watch |
| Age rating | 4+ | 17+ |
| Developer | [SYSGRATION](https://appshunter.io/developer/833548921) | [Alejandro ordonez villar](https://appshunter.io/developer/1871746830) |

## What reviewers say

### M

[App page](https://appshunter.io/ios/app/m-tpms/id1444398690)

**In-app purchases:** none


### Drive Sentinel

[App page](https://appshunter.io/ios/app/drive-sentinel/id6792687553)

**Features:** macOS Compatibility, Family Sharing, Apple Watch app, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Drive Sentinel Pro | $3.99 | one-time |


## Frequently asked questions

### Is M free?

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

### Is Drive Sentinel free?

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

### Do M or Drive Sentinel have ads?

Neither M nor Drive Sentinel shows ads.

### Which is updated more often, M or Drive Sentinel?

M ships an update every 2 months, and Drive Sentinel every 9 days. Most recently, M was updated on October 3, 2026 and Drive Sentinel on October 2, 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.*