# Pi Sequence vs PiAtlas

The clearest difference is in-app purchases: PiAtlas at none against Pi Sequence's 1. PiAtlas also leads on update cadence (every 5 days vs every 3 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Pi Sequence sells 1 one-off in-app purchase. PiAtlas asks for nothing beyond the download.

Pi Sequence ships an update every 3 months, PiAtlas every 5 days. The most recent releases landed on October 10, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | Pi Sequence | PiAtlas |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 5 days** |
| Size | 29 MB | 18 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [晓灵 潘](https://appshunter.io/developer/6781908128) | [Ananke Tech LLC](https://appshunter.io/developer/6780282750) |

## What reviewers say

### Pi Sequence

[App page](https://appshunter.io/ios/app/pi-sequence-memorize-pi/id6783736734)

**Features:** Family Sharing

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock Pro | $3.99 | one-time |


### PiAtlas

[App page](https://appshunter.io/ios/app/piatlas-explore-pi-digits/id6798062570)

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

**In-app purchases:** none


## Frequently asked questions

### Is Pi Sequence free?

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

### Is PiAtlas free?

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

### Do Pi Sequence or PiAtlas have ads?

Neither Pi Sequence nor PiAtlas shows ads.

### Which is updated more often, Pi Sequence or PiAtlas?

Pi Sequence ships an update every 3 months, and PiAtlas every 5 days. Most recently, Pi Sequence was updated on October 10, 2026 and PiAtlas on October 8, 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.*