Book.Events vs FlexiFone
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Book.Events
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The Free Book.Events Check-In App for Event Organisers. Scan barcodes and check in attendees fast.
FlexiFone
This app provides a Multi-Network eSIM for seamless access to major UK networks, ensuring the best coverage wherever you are. You can maintain your primary number while using the eSIM for data, with automatic switching to the strongest signal.
- Multi-Network eSIM access
- Automatic network switching
- Best coverage in UK
- Keep primary number
- Data-focused eSIM
- Physical SIM option
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FlexiFone enables you to get a Multi-Network eSIM which would enable you to access EE, O2, Vodafone & Three's network in the UK. This means that you will always have the best network coverage across the UK. Best part about this is that you can keep your current or primary number, and use the FlexiFone eSIM for data. Your eSIM / SIM will automatically connect to the cellular network with the strongest signal, hence enabling you to have the best coverage even in the countryside, and dense city centers. We do offer Physical-SIMs as well, if you do not have an eSIM-enabled device. Getting started is simple, just download the app, select a plan, and setup your eSIM / Physical-SIM and you're good to go!
Screenshots
Verdict
The clearest difference is update cadence: FlexiFone at every 2 months against Book.Events's every 4 months. Book.Events's advantage is iOS requirement (10.0 vs 14.0.0). On price, ads, in-app purchases and device support 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.
Book.Events ships an update every 4 months, FlexiFone every 2 months. The most recent releases landed on October 26, 2026 and October 1, 2026 respectively.
| Parameter | Book.Events | FlexiFone |
|---|---|---|
| Price | Free | Free |
| Positive reviews | — | 66.7% of reviews |
| Update frequency | Every 4 months | Every 2 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Ad-supported |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 10.0 — better | 14.0.0 |
| Further details — not scored | ||
| Size | 12 MB | 64 MB |
| Age rating | 4+ | 4+ |
| Developer | Radweb Ltd | FlexiFone Telecommunications Limited |
In-app purchases
Book.Events
No in-app purchases
FlexiFone
No in-app purchases
