# Keenculator vs Circle & Sphere

The clearest difference is ads: Circle & Sphere at none against Keenculator's shown. Circle & Sphere also leads on update cadence (every 3 weeks vs every 2 months). Keenculator's advantage is iOS requirement (12.0 vs 15.0). On price, in-app purchases and device support there is nothing between them.

Both are free to download. Keenculator sells 4 in-app purchases, starting at $2.99 per month and Circle & Sphere sells 8 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Keenculator ships an update every 2 months, Circle & Sphere every 3 weeks. The most recent releases landed on October 4, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | Keenculator | Circle & Sphere |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.0 (4 ratings)](https://appshunter.io/ios/app/circle-and-sphere/id1564077078/reviews)** |
| Number of ratings | — | **4** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 2 months | **Every 3 weeks** |
| Monetization | — | Free with in-app purchases |
| Size | 58 MB | 180 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Egor Dovzhenko](https://appshunter.io/developer/782733100) | [Glindemann, Sennoun, Langer GbR](https://appshunter.io/developer/1024972809) |

## What reviewers say

### Keenculator

[App page](https://appshunter.io/ios/app/keenculator/id1437684875)

**Features:** macOS Compatibility, Family Sharing

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro-подписка на 1 месяц | $2.99 | per month |
| Pro-подписка на 6 месяцев | $14.99 | per 6 months |
| Pro-подписка на 1 год | $25.49 | per year |
| Pro версия | $1.99 | one-time |


### Circle & Sphere

[App page](https://appshunter.io/ios/app/circle-and-sphere/id1564077078)

Instantly solve geometry problems for homework and exams. Calculate circle and sphere properties with step-by-step solutions. Access learning videos and manage your calculations.

**Highlights:** Circle calculations (radius, diameter, circumference, area), Sphere calculations (surface area, volume), Circular sector calculations, Step-by-step solutions, Learning videos, Solution management

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

**In-app purchases (8)**

| Purchase | Price | Billing |
| --- | --- | --- |
| +30 User Tokens | $0.29 | one-time |
| +1 Convenience Token / 6h, max. +2 | $0.59 | one-time |
| +2 Convenience Tokens / 6h, max. +4 | $0.99 | one-time |
| +150 User Tokens | $0.99 | one-time |
| +300 User Tokens | $1.49 | one-time |
| +4 Convenience Tokens / 6h, max. +8 | $1.59 | one-time |
| Remove Ads | $2.99 | one-time |
| Lifetime Access | $2.99 | one-time |


## Frequently asked questions

### Is Keenculator free?

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

### Is Circle & Sphere free?

Circle & Sphere is free to download, with in-app purchases available.

### Do Keenculator or Circle & Sphere have ads?

Keenculator shows ads; Circle & Sphere does not.

### Which is updated more often, Keenculator or Circle & Sphere?

Keenculator ships an update every 2 months, and Circle & Sphere every 3 weeks. Most recently, Keenculator was updated on October 4, 2026 and Circle & Sphere on October 2, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*