# SpiroDesigner vs Pi Generator

The clearest difference is price: Pi Generator at Free against SpiroDesigner's $2.99. Pi Generator also leads on update cadence (every 10 days vs every 5 months) and device support (3 vs 1). SpiroDesigner's advantage is in-app purchases (none vs 1). On rating, review sentiment, ratings volume and ads there is nothing between them.

Pi Generator is free to download; SpiroDesigner costs $2.99 up front. Pi Generator sells 1 one-off in-app purchase. SpiroDesigner asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for SpiroDesigner against 5.0 for Pi Generator. Both are backed by a comparable volume of ratings — 1 and 2 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

SpiroDesigner ships an update every 5 months, Pi Generator every 10 days. The most recent releases landed on September 10, 2026 and June 25, 2026 respectively.

## The numbers

| Metric | SpiroDesigner | Pi Generator |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/spirodesigner-spirograph-app/id595177167/reviews) | [5.0 (2 ratings)](https://appshunter.io/ios/app/pi-generator/id1083533056/reviews) |
| Number of ratings | 1 | **2** |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 10 days** |
| Monetization | Paid | **Free** |
| Size | 19 MB | 35 MB |
| Requires iOS | 16.0 | **15.6** |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Masahiko Fukuyama](https://appshunter.io/developer/595177290) | [Mark Duenas](https://appshunter.io/developer/1083533055) |

## What reviewers say

### SpiroDesigner

[App page](https://appshunter.io/ios/app/spirodesigner-spirograph-app/id595177167)

Create intricate geometric patterns and mathematical curves with this digital spirograph tool. Customize circles, lines, and colors to design unique artwork. Features include saving, exporting, and automatic drawing modes.

**Highlights:** Draw epicycloids and hypotrochoids, Customize circle radii and line thickness, Select and edit colors, Save and export drawings as PNG, Automatic drawing mode, Randomize settings, Tutorial videos

**Features:** macOS Compatibility

**In-app purchases:** none


### Pi Generator

[App page](https://appshunter.io/ios/app/pi-generator/id1083533056)

This app generates a large number of pi digits, up to 100,000. It also offers a practice mode for learning pi. Test your device's capabilities with extensive pi calculations.

**Highlights:** Generates up to 10,000 digits of pi, View up to 100,000 digits, Practice learning pi, Device performance testing

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove ads | $1.99 | one-time |


## Frequently asked questions

### Is SpiroDesigner free?

SpiroDesigner costs $2.99, with no in-app purchases.

### Is Pi Generator free?

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

### Which has better reviews, SpiroDesigner or Pi Generator?

SpiroDesigner and Pi Generator are both rated 5.0 out of 5 on the App Store, from 1 and 2 ratings respectively.

### Do SpiroDesigner or Pi Generator have ads?

Neither SpiroDesigner nor Pi Generator shows ads.

### Which is updated more often, SpiroDesigner or Pi Generator?

SpiroDesigner ships an update every 5 months, and Pi Generator every 10 days. Most recently, SpiroDesigner was updated on September 10, 2026 and Pi Generator on June 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.*