# Isometric Paper vs Trigonometry calc

The clearest difference is review sentiment: Isometric Paper at 59% against Trigonometry calc's 0%. Isometric Paper also leads on rating (3.5 vs 3.0) and in-app purchases (none vs 1). Trigonometry calc's advantage is update cadence (every 3 months vs every 16 months). On price and device support there is nothing between them.

Both are free to download. Trigonometry calc sells 1 one-off in-app purchase. Isometric Paper asks for nothing beyond the download.

Isometric Paper holds the better App Store score, 3.5 against 3.0. That said, the two scores are not equally well evidenced: Isometric Paper has 42 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 59% of Isometric Paper's written reviews are positive against 0% of Trigonometry calc's.

Isometric Paper ships an update every 16 months, Trigonometry calc every 3 months. The most recent releases landed on October 24, 2026 and October 18, 2026 respectively.

## The numbers

| Metric | Isometric Paper | Trigonometry calc |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.5 (42 ratings)](https://appshunter.io/ios/app/isometric-paper/id1045446163/reviews)** | [3.0 (2 ratings)](https://appshunter.io/ios/app/trigonometry-calc/id1306864057/reviews) |
| Number of ratings | **42** | 2 |
| Positive reviews | **59.3% of reviews** | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 16 months | **Every 3 months** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 15 MB | 10 MB |
| Requires iOS | **9.0** | 15.6 |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Heiko Etzold](https://appshunter.io/developer/715739131) | [Bo Kalvslund](https://appshunter.io/developer/572272193) |

## What reviewers say

### Isometric Paper

[App page](https://appshunter.io/ios/app/isometric-paper/id1045446163)

Create isometric drawings of various solid objects. This tool allows users to visualize and sketch 3D shapes in an isometric perspective.

**Highlights:** Draw isometric views, Visualize solid objects, 3D shape sketching

**In-app purchases:** none


### 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 |


## Frequently asked questions

### Is Isometric Paper free?

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

### Is Trigonometry calc free?

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

### Which has better reviews, Isometric Paper or Trigonometry calc?

Isometric Paper is rated higher. Isometric Paper averages 3.5 out of 5 from 42 ratings, while Trigonometry calc averages 3.0 from 2 ratings.

### Do Isometric Paper or Trigonometry calc have ads?

Trigonometry calc shows ads; Isometric Paper does not.

### Which is updated more often, Isometric Paper or Trigonometry calc?

Isometric Paper ships an update every 16 months, and Trigonometry calc every 3 months. Most recently, Isometric Paper was updated on October 24, 2026 and Trigonometry calc on October 18, 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.*