Comparison

ADClock Blackboard vs LangClock

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

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
Read full description

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.

About

LangClock

Learn to tell time with analog and digital clocks displayed in multiple Indian languages. This app is ideal for children learning about time or for anyone needing a multilingual desk clock for study or office use.

Highlights
  • Analog clock display
  • Digital clock display
  • Calendar display
  • Multiple Indian languages
  • Educational tool for children
  • Desk clock functionality
Features
Read full description

This app shows analog, digital clock and Calendar in various languages, add alarms, create timers and not only that - personalize clock background with a photo from your own photo library! Hear hourly chime! Our passion for converting creative ideas into iOS apps keeps us going building new apps all the time.We are always greatful to everyone who helps us reach them by downloading our apps.

Screenshots

ADClock Blackboard3 screens
LangClock4 screens

Verdict

The call

The clearest difference is update cadence: ADClock Blackboard at every 10 months against LangClock's every 141 months. ADClock Blackboard also leads on iOS requirement (6.0 vs 18.6). On price, rating, ratings volume and ads 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

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

UpkeepUpdate frequency

ADClock Blackboard ships an update every 10 months, LangClock every 141 months. Both last shipped on November 1, 2026.

Scorecard2 real differences · 7 level
ADClock Blackboard versus LangClock: the parameters behind the verdict, then further details
ParameterADClock BlackboardLangClock
PriceFreeFree
Rating5.0 (1 ratings)5.0 (1 ratings)
Number of ratings11
Update frequencyEvery 10 months — betterEvery 141 months
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPodiPhone, iPad
Requires iOS6.0 — better18.6
Further details — not scored
Size28 MB4 MB
Age rating4+4+
DeveloperHiroyuki Otsukamanish khandekar

Customer experience

ADClock Blackboard

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

LangClock

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

ADClock Blackboard

No in-app purchases

None

LangClock

No in-app purchases

Questions

Is ADClock Blackboard free?
ADClock Blackboard is free to download, with no in-app purchases.
Is LangClock free?
LangClock is free to download, with no in-app purchases.
Which has better reviews, ADClock Blackboard or LangClock?
ADClock Blackboard and LangClock are both rated 5.0 out of 5 on the App Store, from 1 and 1 ratings respectively.
Do ADClock Blackboard or LangClock have ads?
Neither ADClock Blackboard nor LangClock shows ads.
Which is updated more often, ADClock Blackboard or LangClock?
ADClock Blackboard ships an update every 10 months, and LangClock every 141 months. Most recently, ADClock Blackboard was updated on November 1, 2026 and LangClock on November 1, 2026.

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