# AMT vs Key

The clearest difference is update cadence: AMT at every 5 days against Key's every 6 months. Key's advantage is iOS requirement (13.0 vs 15.0). 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.

AMT ships an update every 5 days, Key every 6 months. The most recent releases landed on October 10, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | AMT | Key |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.0 (5 ratings)](https://appshunter.io/ios/app/key-disp/id1612823021/reviews)** |
| Number of ratings | — | **5** |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 5 days** | Every 6 months |
| Monetization | — | Free |
| Size | 9 MB | 266 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Ken Smelquist](https://appshunter.io/developer/1590901415) | [Tianjin Key-Disp Technology Co.,Ltd](https://appshunter.io/developer/1612823023) |

## What reviewers say

### AMT

[App page](https://appshunter.io/ios/app/amt-mrdl/id1590901413)

**Features:** Vision Pro support

**In-app purchases:** none


### Key

[App page](https://appshunter.io/ios/app/key-disp/id1612823021)

This utility app allows users to remotely control and connect to devices, facilitating data transmission and collection. It enables over-the-air upgrades and social sharing, while also displaying meter speeds and reading device information directly from a mobile phone.

**Highlights:** Remote control and connection, Data transmission and collection, Over-the-air (OTA) upgrades, Social sharing capabilities, Meter speed display, Device information reading

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is AMT free?

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

### Is Key free?

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

### Do AMT or Key have ads?

Neither AMT nor Key shows ads.

### Which is updated more often, AMT or Key?

AMT ships an update every 5 days, and Key every 6 months. Most recently, AMT was updated on October 10, 2026 and Key on October 9, 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.*