# Circle & Sphere vs Triangle Calculator Pythagoras

Circle & Sphere and Triangle Calculator Pythagoras both sit at 4.0 stars, but that hides the real split: 100% of Circle & Sphere's written reviews are positive against 0% of Triangle Calculator Pythagoras's. Circle & Sphere also leads on ads (none vs shown) and ratings volume (4 vs 1). On price, rating, update cadence and in-app purchases there is nothing between them.

Both are free to download. Circle & Sphere sells 8 one-off in-app purchases and Triangle Calculator Pythagoras sells 5 in-app purchases, starting at $1.99 per 7 days. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 4.0 for Circle & Sphere against 4.0 for Triangle Calculator Pythagoras. Both are backed by a comparable volume of ratings — 4 and 1 respectively. Written reviews are what separate them: 100% of Circle & Sphere's written reviews are positive against 0% of Triangle Calculator Pythagoras's.

Circle & Sphere ships an update every 3 weeks, Triangle Calculator Pythagoras every 11 days. Both last shipped on November 3, 2026.

## The numbers

| Metric | Circle & Sphere | Triangle Calculator Pythagoras |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.0 (4 ratings)](https://appshunter.io/ios/app/circle-and-sphere/id1564077078/reviews) | [4.0 (1 ratings)](https://appshunter.io/ios/app/triangle-calculator-pythagoras/id1600108278/reviews) |
| Number of ratings | **4** | 1 |
| Positive reviews | **100.0% of reviews** | 0.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 3 weeks | **Every 11 days** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 180 MB | 22 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) | [Muhammed Samil DEMIR](https://appshunter.io/developer/1600108280) |

## 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 |


### Triangle Calculator Pythagoras

[App page](https://appshunter.io/ios/app/triangle-calculator-pythagoras/id1600108278)

Solve for missing sides and angles in right and any triangle. Visualize results with values on the drawing and view step-by-step solutions. Includes a formula library and calculation history.

**Highlights:** Right triangle solver, Any triangle solver (SSS, SAS, ASA, AAS, SSA), Visual triangle drawing with values, Step-by-step formula explanations, Formula library, Calculation history, Degrees, minutes, seconds angle input (Pro)

**Features:** macOS Compatibility, Family Sharing, iPhone Duo support

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Premium | $1.99 | per 7 days |
| Monthly Premium | $4.99 | per month |
| Premium Yearly | $24.99 | per year |
| Pro Lifetime | $29.99 | one-time |
| Pro Lifetime | $49.99 | one-time |


## Frequently asked questions

### Is Circle & Sphere free?

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

### Is Triangle Calculator Pythagoras free?

Triangle Calculator Pythagoras is free to download, with in-app purchases available.

### Which has better reviews, Circle & Sphere or Triangle Calculator Pythagoras?

Circle & Sphere and Triangle Calculator Pythagoras are both rated 4.0 out of 5 on the App Store, from 4 and 1 ratings respectively.

### Do Circle & Sphere or Triangle Calculator Pythagoras have ads?

Triangle Calculator Pythagoras shows ads; Circle & Sphere does not.

### Which is updated more often, Circle & Sphere or Triangle Calculator Pythagoras?

Circle & Sphere ships an update every 3 weeks, and Triangle Calculator Pythagoras every 11 days. Most recently, Circle & Sphere was updated on November 3, 2026 and Triangle Calculator Pythagoras on November 3, 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.*