# Calculator Quest vs Kon21

The clearest difference is rating: Kon21 at 5.0 against Calculator Quest's 4.1. Kon21 also leads on ads (none vs shown) and update cadence (every 4 days vs every 4 months). Calculator Quest's advantage is ratings volume (14 vs 1) and iOS requirement (15.0 vs 26.2). On price, in-app purchases, monetization model 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.

Kon21 holds the better App Store score, 5.0 against 4.1. That said, the two scores are not equally well evidenced: Calculator Quest has 14 ratings behind it against 1, so its average is the more settled of the two.

Calculator Quest ships an update every 4 months, Kon21 every 4 days. The most recent releases landed on October 29, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | Calculator Quest | Kon21 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.1 (14 ratings)](https://appshunter.io/ios/app/calculator-quest/id562822539/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/kon21/id6760956783/reviews)** |
| Number of ratings | **14** | 1 |
| Positive reviews | 72.3% of reviews | — |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 4 months | **Every 4 days** |
| Monetization | Free | Free |
| Size | 9 MB | 19 MB |
| Requires iOS | **15.0** | 26.2 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Masakazu Yonehara](https://appshunter.io/developer/1339210794) | [RetroApps LLC](https://appshunter.io/developer/1845420719) |

## What reviewers say

### Calculator Quest

[App page](https://appshunter.io/ios/app/calculator-quest/id562822539)

This app merges a functional calculator with role-playing game elements. It offers a "Calc mode" for standard calculations, a fast-typing number game, and a mental arithmetic challenge.

**Highlights:** Standard calculator functionality, Fast-typing number game, Mental arithmetic time attack, RPG elements

**Features:** Vision Pro support, iPhone Duo support

**In-app purchases:** none

**What reviewers like**

- 💡 Unique RPG calculator concept
- 👍 Fun and engaging gameplay
- 🎨 Cute and retro graphics
- 🎮 Good for learning math
- ✨ Original and interesting idea

**What reviewers complain about**

- 😠 Intrusive ads
- 📉 Lack of RPG depth
- 🚫 No offline play option
- 👎 Ads block numbers
- 🤷‍♂️ Unclear RPG elements

**Reported bugs**

- App crashes immediately after killing monsters
- Ads showing up on the top blocking off numbers
- App needs to be updated for iOS 11
- Can't use on new iPhone

**Requested features**

- Pay to remove ads option
- Offline play option
- More games to play
- Increase calculation level
- Add different calculation types (add, subtract, multiply, divide)


### Kon21

[App page](https://appshunter.io/ios/app/kon21/id6760956783)

Embark on a cosmic adventure to restore balance to chaotic zodiac realms. Battle evolving creatures using a unique blackjack-inspired card system and master the art of 21 to unleash powerful attacks. Explore pixel-crafted worlds with a retro aesthetic.

**Highlights:** Explore living zodiac realms, Conway-powered evolving creatures, Strategic blackjack-inspired combat, Master the art of 21, Retro pixel aesthetic

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Calculator Quest free?

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

### Is Kon21 free?

Kon21 is free to download, with no in-app purchases.

### Which has better reviews, Calculator Quest or Kon21?

Kon21 is rated higher. Calculator Quest averages 4.1 out of 5 from 14 ratings, while Kon21 averages 5.0 from 1 ratings.

### Do Calculator Quest or Kon21 have ads?

Calculator Quest shows ads; Kon21 does not.

### Which is updated more often, Calculator Quest or Kon21?

Calculator Quest ships an update every 4 months, and Kon21 every 4 days. Most recently, Calculator Quest was updated on October 29, 2026 and Kon21 on October 7, 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.*