# Calculator with reverse screen vs FlexCalc

The clearest difference is in-app purchases: Calculator with reverse screen at none against FlexCalc's 1. FlexCalc's advantage is ads (none vs shown) and iOS requirement (13.0 vs 15.8.3). On price, update cadence and device support there is nothing between them.

Both are free to download. FlexCalc 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, FlexCalc every 3 weeks. Both last shipped on October 25, 2026.

## The numbers

| Metric | Calculator with reverse screen | FlexCalc |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/flexcalc-flexible-calculator/id6785043241/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | **Fortnightly** | Every 3 weeks |
| Monetization | — | Free with in-app purchases |
| Size | 35 MB | 21 MB |
| Requires iOS | 15.8.3 | **13.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Hideaki Uchikoshi](https://appshunter.io/developer/1559575002) | [Tho Tran](https://appshunter.io/developer/1110817755) |

## 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


### FlexCalc

[App page](https://appshunter.io/ios/app/flexcalc-flexible-calculator/id6785043241)

This utility app allows users to create and edit calculations with linked values that update instantly. It offers a history feature to review past work and supports sharing calculations. Users can also customize themes and fonts for a personalized experience.

**Highlights:** Editable calculations, Linked values update automatically, Reuse results in new calculations, Calculation history, Share calculations, Customizable themes and fonts, Scientific functions

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Buy a Coffee | $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 FlexCalc free?

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

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

Calculator with reverse screen shows ads; FlexCalc does not.

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

Calculator with reverse screen ships an update fortnightly, and FlexCalc every 3 weeks. Most recently, Calculator with reverse screen was updated on October 25, 2026 and FlexCalc on October 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.*