Key vs Fly Erp
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Key
Transform your iPhone into a mobile ID card for convenient door access. Securely register your credentials and use your phone to open doors, leveraging advanced encrypted transfer technology.
- Smartphone as mobile ID
- Convenient door opening
- Secure credential transfer
- iPhone integration
- Requires Interflex software
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Your smartphone as a mobile ID card: With the Interflex app "Key", you can conveniently open doors with your iPhone. This is how "Key" works: - Install the app on your iPhone. - Register the app with your access data. - Book with your iPhone to open doors. Thanks to "NetworkOnMobile" technology, we ensure encrypted and secure transfer of the mobile credential to your iPhone. Important: The use of this app requires the use of the Interflex software IF-6040 and suitable badge readers.
Fly Erp
Manage products, stock, receipts, transfers, and sales orders directly from your mobile device. This lightweight ERP provides real-time control over inventory and operations for your team.
- Product management
- Stock control
- Receipt tracking
- Transfer management
- Sales order processing
- Part number management
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FlyErp is a lightweight mobile ERP that lets you manage products, stock, receipts, transfers, sales orders, and part numbers on the go—giving your team real‑time control of inventory and operations.
Screenshots
Verdict
The clearest difference is update cadence: Fly Erp at every 3 weeks against Key's every 4 months. Fly Erp also leads on iOS requirement (12.0 vs 17.0). On price, ads, in-app purchases and monetization model 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 ships an update every 4 months, Fly Erp every 3 weeks. The most recent releases landed on October 2, 2026 and October 1, 2026 respectively.
| Parameter | Key | Fly Erp |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (1 ratings) — better |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | — | 1 — better |
| Update frequency | Every 4 months | Every 3 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPod, Apple Watch | iPhone, iPad, iPod |
| Requires iOS | 17.0 | 12.0 — better |
| Further details — not scored | ||
| Size | 18 MB | 43 MB |
| Age rating | 4+ | 4+ |
| Developer | Interflex Datensysteme GmbH | Flyebike Inc |
Customer experience
Key
Fly Erp
In-app purchases
Key
No in-app purchases
Fly Erp
No in-app purchases
