# Quick mental calculation vs DotCrashPuzzle

The clearest difference is update cadence: DotCrashPuzzle at every 5 days against Quick mental calculation's every 11 days. On price, ads, in-app purchases and device support there is nothing between them.

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

Quick mental calculation ships an update every 11 days, DotCrashPuzzle every 5 days. The most recent releases landed on September 29, 2026 and September 25, 2026 respectively.

## The numbers

| Metric | Quick mental calculation | DotCrashPuzzle |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | Yes | Yes |
| Update frequency | Every 11 days | **Every 5 days** |
| Monetization | — | Ad-supported |
| Size | 21 MB | 66 MB |
| Requires iOS | 12.0 | **11.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [ERX](https://appshunter.io/developer/513941286) | [nekosuko](https://appshunter.io/developer/618952602) |

## What reviewers say

### Quick mental calculation

[App page](https://appshunter.io/ios/app/quick-mental-calculation/id841970890)

**Features:** macOS Compatibility

**In-app purchases:** none


### DotCrashPuzzle

[App page](https://appshunter.io/ios/app/dotcrashpuzzle/id1611034374)

A falling block puzzle game where you align blocks to clear lines and prevent the field from filling up. Features mission and arcade modes with different challenges and increasing difficulty.

**Highlights:** Falling block placement, Line clearing mechanics, Mission mode with stages, Arcade mode with increasing speed, 16x16 playfield, Time-based evaluation

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

**In-app purchases:** none


## Frequently asked questions

### Is Quick mental calculation free?

Quick mental calculation is free to download, with no in-app purchases.

### Is DotCrashPuzzle free?

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

### Do Quick mental calculation or DotCrashPuzzle have ads?

Both Quick mental calculation and DotCrashPuzzle show ads.

### Which is updated more often, Quick mental calculation or DotCrashPuzzle?

Quick mental calculation ships an update every 11 days, and DotCrashPuzzle every 5 days. Most recently, Quick mental calculation was updated on September 29, 2026 and DotCrashPuzzle on September 25, 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.*