# Calctan vs ice sudoku

The clearest difference is review sentiment: ice sudoku at 89% against Calctan's 29%. ice sudoku also leads on in-app purchases (none vs 1) and update cadence (fortnightly vs every 3 months). Calctan's advantage is price (Free vs $1.99) and ratings volume (61 vs 15). On ads and device support there is nothing between them.

Calctan is free to download; ice sudoku costs $1.99 up front. Calctan sells 1 one-off in-app purchase. ice sudoku asks for nothing beyond the download.

ice sudoku holds the better App Store score, 4.8 against 4.5. Both are backed by a comparable volume of ratings — 61 and 15 respectively. Written reviews point the same way: 29% of Calctan's written reviews are positive against 89% of ice sudoku's.

Calctan ships an update every 3 months, ice sudoku fortnightly. Both last shipped on October 29, 2026.

## The numbers

| Metric | Calctan | ice sudoku |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| Rating | [4.5 (61 ratings)](https://appshunter.io/ios/app/calctan/id1445480535/reviews) | **[4.8 (15 ratings)](https://appshunter.io/ios/app/ice-sudoku/id1473595660/reviews)** |
| Number of ratings | **61** | 15 |
| Positive reviews | 28.6% of reviews | **88.9% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 months | **Fortnightly** |
| Monetization | **Free** | Paid |
| Size | 8 MB | 46 MB |
| Requires iOS | **16.6** | 18.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Jorge Lozada](https://appshunter.io/developer/421852863) | [子诚 王](https://appshunter.io/developer/1473595659) |

## What reviewers say

### Calctan

[App page](https://appshunter.io/ios/app/calctan/id1445480535)

This app offers a high-precision scientific and financial calculator with an editable tape for auditing calculations. It supports complex formulas, a wide range of mathematical functions, and customizable constants, all within an ad-free, private interface.

**Highlights:** Smart formula workspace with direct cursor editing, Advanced scientific engine with true order of operations, Auditable calculation history on a digital tape, Exportable reports via AirPrint and PDF, Multitasking support for iPad, iCloud synchronization across devices, Private and ad-free experience

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| No Ads | $0.99 | one-time |


### ice sudoku

[App page](https://appshunter.io/ios/app/ice-sudoku/id1473595660)

This app offers a vast collection of Sudoku puzzles across various difficulty levels, featuring a logic analysis system and customizable gameplay. Enjoy offline play with a focus on privacy and continuous updates.

**Highlights:** Extensive Sudoku question bank, Multiple difficulty levels, Step-by-step logic analysis, Offline play, Customizable gameplay, Sudoku scanning recognition

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Calctan free?

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

### Is ice sudoku free?

ice sudoku costs $1.99, with no in-app purchases.

### Which has better reviews, Calctan or ice sudoku?

ice sudoku is rated higher. Calctan averages 4.5 out of 5 from 61 ratings, while ice sudoku averages 4.8 from 15 ratings.

### Do Calctan or ice sudoku have ads?

Neither Calctan nor ice sudoku shows ads.

### Which is updated more often, Calctan or ice sudoku?

Calctan ships an update every 3 months, and ice sudoku fortnightly. Most recently, Calctan was updated on October 29, 2026 and ice sudoku on October 29, 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.*