# LightCalc.io vs ClappyBoard

The clearest difference is ads: ClappyBoard at none against LightCalc.io's shown. On price, update cadence, in-app purchases and device support there is nothing between them.

Both are free to download. LightCalc.io sells 1 in-app purchase, starting at $34.99 per year and ClappyBoard sells 2 in-app purchases, starting at $7.99 per month. Whichever you choose, the download price is not the number that matters.

Both ship on a similar rhythm, roughly fortnightly. Both last shipped on October 31, 2026.

## The numbers

| Metric | LightCalc.io | ClappyBoard |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Fortnightly | Fortnightly |
| Size | 57 MB | 1 MB |
| Requires iOS | 18.0 | **17.0** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Matthias Streicher-Feldhofer](https://appshunter.io/developer/1896729345) | [Ginsberg AI LLC](https://appshunter.io/developer/1895990338) |

## What reviewers say

### LightCalc.io

[App page](https://appshunter.io/ios/app/lightcalcio/id6770274311)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| LightCalc Plus | $34.99 | per year |


### ClappyBoard

[App page](https://appshunter.io/ios/app/clappyboard-digital-slate/id6795764135)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| ClappyBoard Pro | $7.99 | per month |
| ClappyBoard Pro | $49.99 | per year |


## Frequently asked questions

### Is LightCalc.io free?

LightCalc.io is free to download, with in-app purchases available.

### Is ClappyBoard free?

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

### Do LightCalc.io or ClappyBoard have ads?

LightCalc.io shows ads; ClappyBoard does not.

### Which is updated more often, LightCalc.io or ClappyBoard?

LightCalc.io ships an update fortnightly, and ClappyBoard fortnightly. Most recently, LightCalc.io was updated on October 31, 2026 and ClappyBoard on October 31, 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.*