# SwiftFlow vs Key

The clearest difference is rating: Key at 4.0 against SwiftFlow's 1.8. SwiftFlow's advantage is review sentiment (20% vs 0%) and iOS requirement (9.0 vs 13.0). On price, ratings volume, update cadence and ads 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 1.8. Both are backed by a comparable volume of ratings — 6 and 5 respectively. Written reviews complicate that: 20% of SwiftFlow's written reviews are positive against 0% of Key's, so the app with the better star average is not the one people write more warmly about.

SwiftFlow ships an update every 5 months, Key every 6 months. The most recent releases landed on June 1, 2026 and June 5, 2026 respectively.

## The numbers

| Metric | SwiftFlow | Key |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.8 (6 ratings)](https://appshunter.io/ios/app/swiftflow/id1267248933/reviews) | **[4.0 (5 ratings)](https://appshunter.io/ios/app/key-disp/id1612823021/reviews)** |
| Number of ratings | **6** | 5 |
| Positive reviews | **20.0% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 5 months** | Every 6 months |
| Monetization | Free | Free |
| Size | 20 MB | 266 MB |
| Requires iOS | **9.0** | 13.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Bafang Electric (Suzhou) Co.,Ltd.](https://appshunter.io/developer/1296096980) | [Tianjin Key-Disp Technology Co.,Ltd](https://appshunter.io/developer/1612823023) |

## What reviewers say

### SwiftFlow

[App page](https://appshunter.io/ios/app/swiftflow/id1267248933)

This application connects to Bafang e-bike drive systems to provide real-time ride data, including heart rate and calorie burn. It also offers navigation assistance with traffic updates.

**Highlights:** Real-time ride data, Heart rate monitoring, Calorie tracking, Navigation, Traffic tips

**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 SwiftFlow free?

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

### Is Key free?

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

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

Key is rated higher. SwiftFlow averages 1.8 out of 5 from 6 ratings, while Key averages 4.0 from 5 ratings.

### Do SwiftFlow or Key have ads?

Neither SwiftFlow nor Key shows ads.

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

SwiftFlow ships an update every 5 months, and Key every 6 months. Most recently, SwiftFlow was updated on June 1, 2026 and Key on June 5, 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.*