ADClock Blackboard vs Flip Clock Pro
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
ADClock Blackboard
This utility app displays analog and digital clocks with a unique "Blackboard" design theme. It offers customizable display formats, date indications, and orientation mirroring. Users can also control time signal voice sounds and auto-lock settings.
- Analog and digital clock display
- Blackboard design theme
- 12/24-hour format switch
- Date indication (EN, JP, KR)
- Auto lock ON/OFF
- Horizontal/vertical inversion
- Time signal voice sound
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Analog and digital clock. This design theme is "Blackboard". You can set the various functions in the 2 settings button. General setting -> Setting button. Specific settings for each design -> (Q)uick Setup button. You can see the detail operating movie. Please press information (i) menu, and you will find app website. FEATURES ・12/24-hour display format switch. ・Date indication switch (English, Japanese, Korean). ・Auto lock ON/OFF. ・you can invert the design horizontal or vertical (reflect to mirrors and glass, etc.) ※ Shake -> invert switching. ・Time signal voice sound ON／OFF (English, Japanese). ※ You can switch 30 or 60 minutes intervals. NOTE: ・When this app does not start up, please try double-push the home button, and quit other running apps. ・There is no alarm function. ・Use iPhone or iPod Touch charging up for long term usage. ・Time accuracy is according to the internal clock. There is no time synchronization function. ・The design may be subject to change without notice due to circumstances in the version up.
Flip Clock Pro
Transform your iPhone into a stylish retro flip clock. Easily swipe between different clock designs to personalize your device's look.
- Retro flip clock design
- Customizable clock interfaces
- Swipe to change designs
- Personalize device look
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Turn your iPhone into a beautiful retro flip clock — perfect for your desk, office, or nightstand. • Handcrafted themes: the giant split-flap Departures board, Liquid Glass, Neon Nights, Terminal, Retro Amber, and more — swipe to switch • Custom Clock: pick a style and font, then set your own colors • 12/24-hour time and optional seconds • Screen stays on, works in portrait and landscape
Screenshots
Verdict
The clearest difference is rating: ADClock Blackboard at 5.0 against Flip Clock Pro's 3.7. ADClock Blackboard also leads on update cadence (every 10 months vs every 129 months) and iOS requirement (6.0 vs 16.0). Flip Clock Pro's advantage is ratings volume (3 vs 1). 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.
ADClock Blackboard holds the better App Store score, 5.0 against 3.7. Both are backed by a comparable volume of ratings — 1 and 3 respectively.
ADClock Blackboard ships an update every 10 months, Flip Clock Pro every 129 months. The most recent releases landed on October 6, 2026 and October 8, 2026 respectively.
| Parameter | ADClock Blackboard | Flip Clock Pro |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | 3.7 (3 ratings) |
| Positive reviews | — | 40.0% of reviews |
| Number of ratings | 1 | 3 — better |
| Update frequency | Every 10 months — better | Every 129 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPod | iPhone, iPad |
| Requires iOS | 6.0 — better | 16.0 |
| Further details — not scored | ||
| Size | 28 MB | 2 MB |
| Age rating | 4+ | 4+ |
| Developer | Hiroyuki Otsuka | Bahtiyar Polat |
Customer experience
ADClock Blackboard
Flip Clock Pro
In-app purchases
ADClock Blackboard
No in-app purchases
Flip Clock Pro
No in-app purchases
Questions
Is ADClock Blackboard free?
Is Flip Clock Pro free?
Which has better reviews, ADClock Blackboard or Flip Clock Pro?
Do ADClock Blackboard or Flip Clock Pro have ads?
Which is updated more often, ADClock Blackboard or Flip Clock Pro?
Other comparisons
