CERBToken vs Bad Elf Flex
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
CERBToken
This utility generates secure one-time passwords for authentication with a specific system. It supports both time-based and event-based codes to enhance security.
- One-time password generation
- Time-based OTPs
- Event-based OTPs
- CERB authentication support
- Secure code generation
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CERBToken is an application responsible for generating one-time passwords (time-based or event-based) for use with CERB authentication system.
Bad Elf Flex
This utility app enhances the functionality of Bad Elf Flex and Flex Mini GNSS receivers. It allows users to monitor hardware health, adjust settings, and update firmware. For the Flex model, it also enables the purchase and application of tokens for advanced features and correction sources like SBAS and RTK.
- Monitor GNSS receiver health
- Change hardware settings
- Perform firmware updates
- Purchase and load Flex Tokens
- Enable hardware-based features
- Access correction sources
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This is the free companion utility app for the flexible, intuitive, and affordable Bad Elf Flex and Flex Mini GNSS receivers. Designed for GIS and survey professionals, the Bad Elf Flex and Flex Mini connect to your iPhone or iPad via Bluetooth and provide high-accuracy location data to ANY and ALL field data collection apps in your workflow. This app allows you to view the health of the Flex and Flex Mini hardware, change settings, and perform firmware updates. For the Bad Elf Flex, the app also supports purchasing and loading Flex Tokens into the hardware for enabling hardware-based features and correction sources. Several correction sources are supported including SBAS, RTK via NTRIP, and Atlas (L-band) satellite corrections. Visit https://bad-elf.com/ to learn more about the Bad Elf Flex and Flex Mini GNSS receivers. NOTES: * This app requires a Bad Elf Flex or Flex Mini to operate. * Our "Bad Elf GPS" companion app supports our legacy mapping-grade receivers: Bad Elf GPS Pro, GPS Pro+, Surveyor, and GPS for Lightning dongle. * Continued use of the GPS running in the background can dramatically decrease battery life.
Screenshots
Verdict
The clearest difference is review sentiment: CERBToken at 100% against Bad Elf Flex's 40%. CERBToken also leads on rating (4.7 vs 3.6) and iOS requirement (12.1 vs 15.5). Bad Elf Flex's advantage is ratings volume (14 vs 3). On price, update cadence, ads and in-app purchases 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.
CERBToken holds the better App Store score, 4.7 against 3.6. Both are backed by a comparable volume of ratings — 3 and 14 respectively. Written reviews point the same way: 100% of CERBToken's written reviews are positive against 40% of Bad Elf Flex's.
CERBToken ships an update every 6 weeks, Bad Elf Flex every 2 months. The most recent releases landed on July 4, 2026 and September 26, 2026 respectively.
| Parameter | CERBToken | Bad Elf Flex |
|---|---|---|
| Price | Free | Free |
| Rating | 4.7 (3 ratings) — better | 3.6 (14 ratings) |
| Positive reviews | 100.0% of reviews — better | 40.0% of reviews |
| Number of ratings | 3 | 14 — better |
| Update frequency | Every 6 weeks — better | Every 2 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 12.1 — better | 15.5 |
| Further details — not scored | ||
| Size | 22 MB | 33 MB |
| Age rating | 4+ | 4+ |
| Developer | Fudo Security Sp. z o.o. | Bad Elf, LLC. |
Customer experience
CERBToken
Bad Elf Flex
In-app purchases
CERBToken
No in-app purchases
Bad Elf Flex
No in-app purchases
