# ADClock Blackboard vs LangClock

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.

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

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.

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

## The numbers

| Metric | ADClock Blackboard | LangClock |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/adclock-blackboard/id574832850/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/langclock/id979100121/reviews) |
| Number of ratings | 1 | 1 |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 10 months** | Every 141 months |
| Monetization | Free | Free |
| Size | 28 MB | 4 MB |
| Requires iOS | **6.0** | 18.6 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Hiroyuki Otsuka](https://appshunter.io/developer/554117199) | [manish khandekar](https://appshunter.io/developer/673813607) |

## 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


### LangClock

[App page](https://appshunter.io/ios/app/langclock/id979100121)

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:** 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 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.

---

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