AMT vs Key
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
AMT
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This app allows you to connect to and read your DD-Meter.
Key
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.
- Remote control and connection
- Data transmission and collection
- Over-the-air (OTA) upgrades
- Social sharing capabilities
- Meter speed display
- Device information reading
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1. Remote control and connection 2. Data transmission, collection, OTA upgrade, social sharing 3. The mobile phone APP realizes the display of the meter speed 4. Read device information
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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 September 23, 2026 respectively.
| Parameter | AMT | Key |
|---|---|---|
| Price | Free | Free |
| Rating | — | 4.0 (5 ratings) — better |
| Positive reviews | — | 0.0% of reviews |
| Number of ratings | — | 5 — better |
| Update frequency | Every 5 days — better | Every 6 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Free |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 15.0 | 13.0 — better |
| Further details — not scored | ||
| Size | 9 MB | 266 MB |
| Age rating | 4+ | 4+ |
| Developer | Ken Smelquist | Tianjin Key-Disp Technology Co.,Ltd |
In-app purchases
AMT
No in-app purchases
Key
No in-app purchases
