Book'u Timer vs ZoneFlow
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Book'u Timer
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The employee can log in using a unique pin code. The moment someone logs in, there is a double check based on a picture taken. The Timer application is linked to your Book'u account so that live updates are immediately visible. Everything can also be exported to Excel. With this Book'u timer, you have the most powerful tool to optimally manage and deploy your personnel file. Furthermore, it complies with the new European privacy law. This Book'u timer is only accessible for Book'u users.
ZoneFlow
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Keep the right timezone in front of you, automatically. ZoneFlow is a widget-first timezone app that changes what it shows throughout the day, based on a schedule you set. No more mental math, no more opening a world clock app to check what time it is for the person you're about to call. Whether you're keeping up with friends and family abroad, coordinating with a remote team across time zones, or travelling, ZoneFlow keeps the time that matters most right on your Home Screen and Lock Screen — right when you need it. FEATURES • Schedule different timezones to appear on your widget at different times of day • Widgets for Home Screen and Lock Screen • Automatic switching — set it up once and ZoneFlow handles the rest • Built natively in Swift with SwiftData and WidgetKit for a fast, reliable experience ZoneFlow is free to use, with a Pro upgrade available for additional timezone schedules and widgets. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is in-app purchases: Book'u Timer at none against ZoneFlow's 2. Book'u Timer also leads on ads (none vs shown) and device support (3 vs 1). ZoneFlow's advantage is update cadence (every 3 days vs every 2 months). On price 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. ZoneFlow sells 2 in-app purchases, starting at $2.99 per month. Book'u Timer asks for nothing beyond the download.
Book'u Timer ships an update every 2 months, ZoneFlow every 3 days. The most recent releases landed on November 2, 2026 and November 5, 2026 respectively.
| Parameter | Book'u Timer | ZoneFlow |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 2 months | Every 3 days — better |
| Ads | No — better | Yes |
| In-app purchases | No — better | Yes |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 15.0 — better | 18.0 |
| Further details — not scored | ||
| Size | 51 MB | 19 MB |
| Age rating | 4+ | 4+ |
| Developer | Smalltalk bvba | Benji Mandel |
In-app purchases
Book'u Timer
No in-app purchases
ZoneFlow
- ZoneFlow Pro Monthly7 Days trial$2.991 Month
- ZoneFlow Pro Yearly7 Days trial$14.991 Year
Questions
Is Book'u Timer free?
Is ZoneFlow free?
Do Book'u Timer or ZoneFlow have ads?
Which is updated more often, Book'u Timer or ZoneFlow?
Other comparisons
