# TM550 vs FDS Device Manager

The clearest difference is update cadence: TM550 at every 2 months against FDS Device Manager's every 3 months. TM550 also leads on iOS requirement (12.0 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.

TM550 ships an update every 2 months, FDS Device Manager every 3 months. The most recent releases landed on October 27, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | TM550 | FDS Device Manager |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 3 months |
| Size | 42 MB | 26 MB |
| Requires iOS | **12.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [ITS-CHRONO](https://appshunter.io/developer/1278336293) | [FDS-Timing Sarl](https://appshunter.io/developer/1208225025) |

## What reviewers say

### TM550

[App page](https://appshunter.io/ios/app/tm550/id1659378867)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### FDS Device Manager

[App page](https://appshunter.io/ios/app/fds-device-manager/id6469463485)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is TM550 free?

TM550 is free to download, with no in-app purchases.

### Is FDS Device Manager free?

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

### Do TM550 or FDS Device Manager have ads?

Neither TM550 nor FDS Device Manager shows ads.

### Which is updated more often, TM550 or FDS Device Manager?

TM550 ships an update every 2 months, and FDS Device Manager every 3 months. Most recently, TM550 was updated on October 27, 2026 and FDS Device Manager on October 30, 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.*