# Timer with reverse screen vs Concrete Calculator

The clearest difference is in-app purchases: Timer with reverse screen at none against Concrete Calculator's 2. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Concrete Calculator sells 2 in-app purchases, starting at $4.99 per month. Timer with reverse screen asks for nothing beyond the download.

Timer with reverse screen ships an update every 2 weeks, Concrete Calculator fortnightly. The most recent releases landed on October 14, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | Timer with reverse screen | Concrete Calculator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.5 (12 ratings)](https://appshunter.io/ios/app/concrete-calculator/id6742077717/reviews)** |
| Number of ratings | — | **12** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | **Every 2 weeks** | Fortnightly |
| Monetization | — | Free with in-app purchases |
| Size | 36 MB | 40 MB |
| Requires iOS | **15.8.3** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Hideaki Uchikoshi](https://appshunter.io/developer/1559575002) | [xNeat.com](https://appshunter.io/developer/327498295) |

## What reviewers say

### Timer with reverse screen

[App page](https://appshunter.io/ios/app/timer-with-reverse-screen/id6502266989)

**Features:** macOS Compatibility

**In-app purchases:** none


### Concrete Calculator

[App page](https://appshunter.io/ios/app/concrete-calculator/id6742077717)

Calculate precise concrete quantities for various construction projects like patios, sidewalks, and walls. Get estimates for materials, including concrete, blocks, rebar, and gravel, in both US customary and metric units. This tool helps save time and money for DIYers and professionals alike.

**Highlights:** Estimate concrete for slabs, footings, walls, and more, Calculate block count and material needs, Determine rebar and mesh reinforcement, Figure gravel and asphalt requirements, Measure area and volume in multiple units, View results in US customary or metric

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Concrete Calculator | $4.99 | per month |
| Concrete Calculator | $39.99 | per year |


## Frequently asked questions

### Is Timer with reverse screen free?

Timer with reverse screen is free to download, with no in-app purchases.

### Is Concrete Calculator free?

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

### Do Timer with reverse screen or Concrete Calculator have ads?

Both Timer with reverse screen and Concrete Calculator show ads.

### Which is updated more often, Timer with reverse screen or Concrete Calculator?

Timer with reverse screen ships an update every 2 weeks, and Concrete Calculator fortnightly. Most recently, Timer with reverse screen was updated on October 14, 2026 and Concrete Calculator on October 12, 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.*