# Trigonometry calc vs Circle & Sphere

The clearest difference is review sentiment: Circle & Sphere at 100% against Trigonometry calc's 0%. Circle & Sphere also leads on rating (4.0 vs 3.0) and ads (none vs shown). On price, ratings volume, in-app purchases and monetization model there is nothing between them.

Both are free to download. Trigonometry calc sells 1 one-off in-app purchase and Circle & Sphere sells 8 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Circle & Sphere holds the better App Store score, 4.0 against 3.0. Both are backed by a comparable volume of ratings — 2 and 4 respectively. Written reviews point the same way: 0% of Trigonometry calc's written reviews are positive against 100% of Circle & Sphere's.

Trigonometry calc ships an update every 3 months, Circle & Sphere every 3 weeks. The most recent releases landed on October 18, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | Trigonometry calc | Circle & Sphere |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.0 (2 ratings)](https://appshunter.io/ios/app/trigonometry-calc/id1306864057/reviews) | **[4.0 (4 ratings)](https://appshunter.io/ios/app/circle-and-sphere/id1564077078/reviews)** |
| Number of ratings | 2 | **4** |
| Positive reviews | 0.0% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 3 months | **Every 3 weeks** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 10 MB | 180 MB |
| Requires iOS | 15.6 | **15.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Bo Kalvslund](https://appshunter.io/developer/572272193) | [Glindemann, Sennoun, Langer GbR](https://appshunter.io/developer/1024972809) |

## What reviewers say

### Trigonometry calc

[App page](https://appshunter.io/ios/app/trigonometry-calc/id1306864057)

Calculate side lengths and angles in right-angled triangles using Pythagorean theorem and trigonometry functions. Learn basic trigonometry concepts. An optional premium version removes ads and unlocks a general triangle calculator.

**Highlights:** Calculate side lengths, Calculate angles, Pythagorean Theorem, Trigonometry functions, Learn simple trigonometry, General triangle calculator (premium)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium | $0.99 | 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 Trigonometry calc free?

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

### Is Circle & Sphere free?

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

### Which has better reviews, Trigonometry calc or Circle & Sphere?

Circle & Sphere is rated higher. Trigonometry calc averages 3.0 out of 5 from 2 ratings, while Circle & Sphere averages 4.0 from 4 ratings.

### Do Trigonometry calc or Circle & Sphere have ads?

Trigonometry calc shows ads; Circle & Sphere does not.

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

Trigonometry calc ships an update every 3 months, and Circle & Sphere every 3 weeks. Most recently, Trigonometry calc was updated on October 18, 2026 and Circle & Sphere on October 2, 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.*