# ADClock Blackboard vs Flip Clock Pro

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.

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.

## The numbers

| Metric | ADClock Blackboard | Flip Clock Pro |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/adclock-blackboard/id574832850/reviews)** | [3.7 (3 ratings)](https://appshunter.io/ios/app/flip-clock-pro/id1073364656/reviews) |
| Number of ratings | 1 | **3** |
| Positive reviews | — | 40.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 10 months** | Every 129 months |
| Monetization | Free | Free |
| Size | 28 MB | 2 MB |
| Requires iOS | **6.0** | 16.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Hiroyuki Otsuka](https://appshunter.io/developer/554117199) | [Bahtiyar Polat](https://appshunter.io/developer/354062184) |

## What reviewers say

### ADClock Blackboard

[App page](https://appshunter.io/ios/app/adclock-blackboard/id574832850)

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.

**Highlights:** 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

**Features:** macOS Compatibility

**In-app purchases:** none


### Flip Clock Pro

[App page](https://appshunter.io/ios/app/flip-clock-pro/id1073364656)

Transform your iPhone into a stylish retro flip clock. Easily swipe between different clock designs to personalize your device's look.

**Highlights:** Retro flip clock design, Customizable clock interfaces, Swipe to change designs, Personalize device look

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is ADClock Blackboard free?

ADClock Blackboard is free to download, with no in-app purchases.

### Is Flip Clock Pro free?

Flip Clock Pro is free to download, with no in-app purchases.

### Which has better reviews, ADClock Blackboard or Flip Clock Pro?

ADClock Blackboard is rated higher. ADClock Blackboard averages 5.0 out of 5 from 1 ratings, while Flip Clock Pro averages 3.7 from 3 ratings.

### Do ADClock Blackboard or Flip Clock Pro have ads?

Neither ADClock Blackboard nor Flip Clock Pro shows ads.

### Which is updated more often, ADClock Blackboard or Flip Clock Pro?

ADClock Blackboard ships an update every 10 months, and Flip Clock Pro every 129 months. Most recently, ADClock Blackboard was updated on October 6, 2026 and Flip Clock Pro on October 8, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*