# Calculator with reverse screen vs HourChime

The clearest difference is in-app purchases: Calculator with reverse screen at none against HourChime's 1. Calculator with reverse screen also leads on update cadence (fortnightly vs every 2 months) and iOS requirement (15.8.3 vs 17.0). HourChime's advantage is ads (none vs shown). On price and device support there is nothing between them.

Both are free to download. HourChime sells 1 one-off in-app purchase. Calculator with reverse screen asks for nothing beyond the download.

Calculator with reverse screen ships an update fortnightly, HourChime every 2 months. The most recent releases landed on October 4, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | Calculator with reverse screen | HourChime |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.7 (3 ratings)](https://appshunter.io/ios/app/hourchime/id6753335220/reviews)** |
| Number of ratings | — | **3** |
| Positive reviews | — | 61.5% of reviews |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | **Fortnightly** | Every 2 months |
| Monetization | — | Free with in-app purchases |
| Size | 35 MB | 13 MB |
| Requires iOS | **15.8.3** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Hideaki Uchikoshi](https://appshunter.io/developer/1559575002) | [Mitsuhiro Hashimoto](https://appshunter.io/developer/509482512) |

## What reviewers say

### Calculator with reverse screen

[App page](https://appshunter.io/ios/app/calculator-with-reverse-screen/id6497792768)

**Features:** macOS Compatibility

**In-app purchases:** none


### HourChime

[App page](https://appshunter.io/ios/app/hourchime/id6753335220)

This app provides hourly or 30-minute voice cues and sounds to help you stay focused and on track. It features customizable quiet hours and a clean, battery-friendly interface. The app is designed for reliable background operation.

**Highlights:** Hourly/30-minute chime intervals, Spoken time announcements, Customizable mute schedule, Background operation, Battery-friendly design, Light/Dark Mode support

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium | $1.99 | one-time |


## Frequently asked questions

### Is Calculator with reverse screen free?

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

### Is HourChime free?

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

### Do Calculator with reverse screen or HourChime have ads?

Calculator with reverse screen shows ads; HourChime does not.

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

Calculator with reverse screen ships an update fortnightly, and HourChime every 2 months. Most recently, Calculator with reverse screen was updated on October 4, 2026 and HourChime 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.*