# Key vs Duotts

The clearest difference is rating: Key at 4.0 against Duotts's 1.0. Key also leads on update cadence (every 6 months vs every 16 months) and ratings volume (5 vs 1). On price, review sentiment, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Key holds the better App Store score, 4.0 against 1.0. That said, the two scores are not equally well evidenced: Key has 5 ratings behind it against 1, so its average is the more settled of the two. Written reviews split almost evenly too, at 0% and 0% positive.

Key ships an update every 6 months, Duotts every 16 months. Both last shipped on October 24, 2026.

## The numbers

| Metric | Key | Duotts |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (5 ratings)](https://appshunter.io/ios/app/key-disp/id1612823021/reviews)** | [1.0 (1 ratings)](https://appshunter.io/ios/app/duotts/id6475398278/reviews) |
| Number of ratings | **5** | 1 |
| Positive reviews | 0.0% of reviews | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 6 months** | Every 16 months |
| Monetization | Free | Free |
| Size | 266 MB | 258 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Tianjin Key-Disp Technology Co.,Ltd](https://appshunter.io/developer/1612823023) | [Shenzhen Yiwoke Technology Co., Ltd](https://appshunter.io/developer/1724161106) |

## What reviewers say

### 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


### Duotts

[App page](https://appshunter.io/ios/app/duotts/id6475398278)

This app enhances your riding experience with intelligent monitoring of speed and battery. It offers one-click device control, community features to connect with other riders, and detailed recording of your riding data and achievements.

**Highlights:** Real-time speed and battery monitoring, One-click device operation, Community interaction and rider connection, Riding data recording and mileage tracking, Personalized honors and leaderboards

**In-app purchases:** none


## Frequently asked questions

### Is Key free?

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

### Is Duotts free?

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

### Which has better reviews, Key or Duotts?

Key is rated higher. Key averages 4.0 out of 5 from 5 ratings, while Duotts averages 1.0 from 1 ratings.

### Do Key or Duotts have ads?

Neither Key nor Duotts shows ads.

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

Key ships an update every 6 months, and Duotts every 16 months. Most recently, Key was updated on October 24, 2026 and Duotts on October 24, 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.*