ADClock Blackboard vs Desk Clock Display
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.
Desk Clock Display
Transform your iPhone or iPad into a functional desk clock with an always-on display. Features include customizable clock faces, timers, and Pomodoro sessions. An upgrade unlocks all features.
- Always-on display
- Customizable clock faces
- Countdown timers up to 24 hours
- Pomodoro Technique timer
- Adjustable brightness
- Date display toggle
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With Desk Clock Display you can turn your iPhone and iPad into a real watch. Simple. Clean. Convenient. ALWAYS ON DISPLAY Even if your iPhone or iPad has auto-dimm function, the Desk Clock Display app will always stay ON. Quickly change Brightness to max or min if needed. CLOCK Use it as a standby desk clock during the day or at night. TIMER* Set any Countdown timers up to 24 hours. POMODORO* Improve your time management using Pomodoro Technique: 25 minutes of concentration, 5 or 10 minutes to take a rest. CUSTOMIZATION* • Change color. • Change the format. • Display or hide the date. • Instantly change brightness. * - Upgrade to Pro Version in order to unlock all functions.
Screenshots
Verdict
The clearest difference is rating: ADClock Blackboard at 5.0 against Desk Clock Display's 4.5. ADClock Blackboard also leads on in-app purchases (none vs 1) and ads (none vs shown). Desk Clock Display's advantage is ratings volume (24 vs 1) and device support (4 vs 2). On price and update cadence 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. Desk Clock Display sells 1 one-off in-app purchase. ADClock Blackboard asks for nothing beyond the download.
ADClock Blackboard holds the better App Store score, 5.0 against 4.5. That said, the two scores are not equally well evidenced: Desk Clock Display has 24 ratings behind it against 1, so its average is the more settled of the two.
ADClock Blackboard ships an update every 10 months, Desk Clock Display every 15 months. The most recent releases landed on October 6, 2026 and October 14, 2026 respectively.
| Parameter | ADClock Blackboard | Desk Clock Display |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | 4.5 (24 ratings) |
| Positive reviews | — | 0.0% of reviews |
| Number of ratings | 1 | 24 — better |
| Update frequency | Every 10 months — better | Every 15 months |
| Ads | No — better | Yes |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPod | iPhone, iPad, iPod, Mac — better |
| Requires iOS | 6.0 — better | 13.0 |
| Further details — not scored | ||
| Size | 28 MB | 12 MB |
| Age rating | 4+ | 4+ |
| Developer | Hiroyuki Otsuka | Vladislav Kovalyov |
Customer experience
ADClock Blackboard
Desk Clock Display
In-app purchases
ADClock Blackboard
No in-app purchases
Desk Clock Display
- Pro Version$0.99
Questions
Is ADClock Blackboard free?
Is Desk Clock Display free?
Which has better reviews, ADClock Blackboard or Desk Clock Display?
Do ADClock Blackboard or Desk Clock Display have ads?
Which is updated more often, ADClock Blackboard or Desk Clock Display?
Other comparisons
