# Quick mental calculation vs Downtown Battle Days

The clearest difference is in-app purchases: Quick mental calculation at none against Downtown Battle Days's 1. Quick mental calculation also leads on update cadence (every 11 days vs every 2 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Downtown Battle Days sells 1 one-off in-app purchase. Quick mental calculation asks for nothing beyond the download.

Quick mental calculation ships an update every 11 days, Downtown Battle Days every 2 months. The most recent releases landed on September 29, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | Quick mental calculation | Downtown Battle Days |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | **Every 11 days** | Every 2 months |
| Size | 21 MB | 248 MB |
| Requires iOS | 12.0 | 12.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 12+ |
| Developer | [ERX](https://appshunter.io/developer/513941286) | [D.H Inc.](https://appshunter.io/developer/575481212) |

## What reviewers say

### Quick mental calculation

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

**Features:** macOS Compatibility

**In-app purchases:** none


### Downtown Battle Days

[App page](https://appshunter.io/ios/app/downtown-battle-days/id6445868609)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| No AD Pack | $0.49 | one-time |


## Frequently asked questions

### Is Quick mental calculation free?

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

### Is Downtown Battle Days free?

Downtown Battle Days is free to download, with in-app purchases available.

### Do Quick mental calculation or Downtown Battle Days have ads?

Both Quick mental calculation and Downtown Battle Days show ads.

### Which is updated more often, Quick mental calculation or Downtown Battle Days?

Quick mental calculation ships an update every 11 days, and Downtown Battle Days every 2 months. Most recently, Quick mental calculation was updated on September 29, 2026 and Downtown Battle Days on October 8, 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.*