# Kalc vs RedoCalc

The clearest difference is ads: Kalc at none against RedoCalc's shown. Kalc also leads on iOS requirement (13.4 vs 18.0). RedoCalc's advantage is update cadence (every 3 days vs every 9 days). On price, 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.

Kalc ships an update every 9 days, RedoCalc every 3 days. The most recent releases landed on June 1, 2026 and September 8, 2026 respectively.

## The numbers

| Metric | Kalc | RedoCalc |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (3 ratings)](https://appshunter.io/ios/app/kalc/id610991936/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 96.2% of reviews | — |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 9 days | **Every 3 days** |
| Monetization | Free | — |
| Size | 24 MB | 3 MB |
| Requires iOS | **13.4** | 18.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [YUTA OKAJIMA](https://appshunter.io/developer/610991939) | [Toshiyuki Kuwabara](https://appshunter.io/developer/1649322074) |

## What reviewers say

### Kalc

[App page](https://appshunter.io/ios/app/kalc/id610991936)

This utility app offers a unit converter, calculator, and world clock. Its user-friendly interface is designed for quick access to everyday calculations and conversions.

**Highlights:** Unit converter, Calculator, World clock, Simple UI, Quick results

**Features:** macOS Compatibility

**In-app purchases:** none


### RedoCalc

[App page](https://appshunter.io/ios/app/redocalc/id6743318834)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Kalc free?

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

### Is RedoCalc free?

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

### Do Kalc or RedoCalc have ads?

RedoCalc shows ads; Kalc does not.

### Which is updated more often, Kalc or RedoCalc?

Kalc ships an update every 9 days, and RedoCalc every 3 days. Most recently, Kalc was updated on June 1, 2026 and RedoCalc on September 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.*