# ADClock Blackboard vs Air Clock

The clearest difference is in-app purchases: ADClock Blackboard at none against Air Clock's 3. ADClock Blackboard also leads on iOS requirement (6.0 vs 15.0). Air Clock's advantage is update cadence (fortnightly vs every 10 months) and device support (4 vs 2). On price, rating, ratings volume and ads there is nothing between them.

Both are free to download. Air Clock sells 3 in-app purchases, starting at $0.39 per month. ADClock Blackboard asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for ADClock Blackboard against 5.0 for Air Clock. Both are backed by a comparable volume of ratings — 1 and 2 respectively.

ADClock Blackboard ships an update every 10 months, Air Clock fortnightly. The most recent releases landed on October 6, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | ADClock Blackboard | Air Clock |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/adclock-blackboard/id574832850/reviews) | [5.0 (2 ratings)](https://appshunter.io/ios/app/air-clock-flip-clock-widget/id6648756364/reviews) |
| Number of ratings | 1 | **2** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 10 months | **Fortnightly** |
| Monetization | **Free** | Freemium |
| Size | 28 MB | 43 MB |
| Requires iOS | **6.0** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Hiroyuki Otsuka](https://appshunter.io/developer/554117199) | [志远 冯](https://appshunter.io/developer/1763733899) |

## 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


### Air Clock

[App page](https://appshunter.io/ios/app/air-clock-flip-clock-widget/id6648756364)

Enhance your device with a visually stunning and ad-free clock experience. Customize themes, add dynamic photo displays, and utilize integrated widgets for time management. Includes a Pomodoro timer and auditory cues for productivity.

**Highlights:** Ad-free full-screen display, Customizable themes and colors, Dynamic photo clock integration, Multiple widget types (clock, calendar, countdown), Focus Pomodoro timer, Auditory and voice chimes

**Features:** Family Sharing

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Monthly Membership | $0.39 | per month |
| Pro Annual Membership | $2.00 | per year |
| Pro Lifetime Membership | $4.99 | one-time |


## Frequently asked questions

### Is ADClock Blackboard free?

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

### Is Air Clock free?

Air Clock is free to download, with in-app purchases available.

### Which has better reviews, ADClock Blackboard or Air Clock?

ADClock Blackboard and Air Clock are both rated 5.0 out of 5 on the App Store, from 1 and 2 ratings respectively.

### Do ADClock Blackboard or Air Clock have ads?

Neither ADClock Blackboard nor Air Clock shows ads.

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

ADClock Blackboard ships an update every 10 months, and Air Clock fortnightly. Most recently, ADClock Blackboard was updated on October 6, 2026 and Air Clock on October 11, 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.*