# Circle & Sphere vs Dollar and Cent

The clearest difference is price: Circle & Sphere at Free against Dollar and Cent's $0.49. Circle & Sphere also leads on update cadence (every 3 weeks vs every 4 months) and iOS requirement (15.0 vs 17.0). Dollar and Cent's advantage is in-app purchases (none vs 8) and chart position (#166 vs unranked). On ads and device support there is nothing between them.

Circle & Sphere is free to download; Dollar and Cent costs $0.49 up front. Circle & Sphere sells 8 one-off in-app purchases. Dollar and Cent asks for nothing beyond the download.

Circle & Sphere ships an update every 3 weeks, Dollar and Cent every 4 months. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Circle & Sphere | Dollar and Cent |
| --- | --- | --- |
| Price | **Free** | $0.49 |
| 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 | **No** |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 4 months |
| Monetization | Free with in-app purchases | — |
| Best chart rank | — | **#166** |
| Size | 180 MB | 27 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Glindemann, Sennoun, Langer GbR](https://appshunter.io/developer/1024972809) | [Murat Saygin](https://appshunter.io/developer/1835723040) |

## What reviewers say

### 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 |


### Dollar and Cent

[App page](https://appshunter.io/ios/app/dollar-and-cent/id6757005440)

**Currently charting:** #166 Top Paid · Education (US App Store)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Circle & Sphere free?

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

### Is Dollar and Cent free?

Dollar and Cent costs $0.49, with no in-app purchases.

### Do Circle & Sphere or Dollar and Cent have ads?

Neither Circle & Sphere nor Dollar and Cent shows ads.

### Which is updated more often, Circle & Sphere or Dollar and Cent?

Circle & Sphere ships an update every 3 weeks, and Dollar and Cent every 4 months. Most recently, Circle & Sphere was updated on October 24, 2026 and Dollar and Cent on October 25, 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.*