# Hexaflexagons vs Calcu

The clearest difference is in-app purchases: Calcu at none against Hexaflexagons's 2. Calcu also leads on update cadence (every 3 days vs monthly). Hexaflexagons's advantage is ratings volume (27 vs 1) and iOS requirement (13.0 vs 15.0). On price, rating, ads and device support there is nothing between them.

Both are free to download. Hexaflexagons sells 2 one-off in-app purchases. Calcu asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for Hexaflexagons against 5.0 for Calcu. That said, the two scores are not equally well evidenced: Hexaflexagons has 27 ratings behind it against 1, so its average is the more settled of the two.

Hexaflexagons ships an update monthly, Calcu every 3 days. Both last shipped on June 8, 2026.

## The numbers

| Metric | Hexaflexagons | Calcu |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (27 ratings)](https://appshunter.io/ios/app/hexaflexagons/id1503279832/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/calcu-logarithm/id6698852208/reviews) |
| Number of ratings | **27** | 1 |
| Positive reviews | 97.7% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Monthly | **Every 3 days** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 38 MB | 3 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [VUXO I, CORP.](https://appshunter.io/developer/1144164576) | [Yuri Morozov](https://appshunter.io/developer/1582368813) |

## What reviewers say

### Hexaflexagons

[App page](https://appshunter.io/ios/app/hexaflexagons/id1503279832)

Design and create unique paper puzzles with hidden sides. Personalize them with your own designs or use templates for secret messages, photo gifts, or custom cards.

**Highlights:** Design custom hexaflexagons, Use pre-made designs, Create secret messages, Make photo gifts, Design birthday cards, Printable designs

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Make unlimited hexaflexagons | $3.99 | one-time |
| Make unlimited hexaflexagons | $4.99 | one-time |


### Calcu

[App page](https://appshunter.io/ios/app/calcu-logarithm/id6698852208)

This app provides advanced logarithmic calculations and explanations, covering equation solving, Taylor series, digit-by-digit computation, and integral definitions. It also simplifies expressions, solves complex logarithmic equations, and includes a virtual slide rule.

**Highlights:** Solves logarithmic equations for y, x, and a, Explains Taylor series for log_e(x), Illustrates digit-by-digit log_10(x) computation, Explains log_e definition via integrals, Simplifies logarithmic expressions, Calculates and graphs complex logarithms, Includes virtual slide rule

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Hexaflexagons free?

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

### Is Calcu free?

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

### Which has better reviews, Hexaflexagons or Calcu?

Hexaflexagons and Calcu are both rated 5.0 out of 5 on the App Store, from 27 and 1 ratings respectively.

### Do Hexaflexagons or Calcu have ads?

Neither Hexaflexagons nor Calcu shows ads.

### Which is updated more often, Hexaflexagons or Calcu?

Hexaflexagons ships an update monthly, and Calcu every 3 days. Most recently, Hexaflexagons was updated on June 8, 2026 and Calcu on June 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.*