SwiftFlow vs Key
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
SwiftFlow
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.
- Real-time ride data
- Heart rate monitoring
- Calorie tracking
- Navigation
- Traffic tips
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A mobile phone application for e-bikes, which is only adapted to Bafang drive systems. It supports real-time access to ride data, real-time access to human health data such as heartbeat and calorie data, and access to navigation Steering and traffic tips.
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 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.
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.
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.
| Parameter | SwiftFlow | Key |
|---|---|---|
| Price | Free | Free |
| Rating | 1.8 (6 ratings) | 4.0 (5 ratings) — better |
| Positive reviews | 20.0% of reviews — better | 0.0% of reviews |
| Number of ratings | 6 — better | 5 |
| Update frequency | Every 5 months — better | Every 6 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPod | iPhone, iPod |
| Requires iOS | 9.0 — better | 13.0 |
| Further details — not scored | ||
| Size | 20 MB | 266 MB |
| Age rating | 4+ | 4+ |
| Developer | Bafang Electric (Suzhou) Co.,Ltd. | Tianjin Key-Disp Technology Co.,Ltd |
Customer experience
SwiftFlow
Key
In-app purchases
SwiftFlow
No in-app purchases
Key
No in-app purchases
