# Polymath vs Occam SI

The clearest difference is update cadence: Polymath at every 3 weeks against Occam SI's every 2 months. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Polymath ships an update every 3 weeks, Occam SI every 2 months. The most recent releases landed on October 5, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | Polymath | Occam SI |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 2 months |
| Size | 11 MB | 47 MB |
| Requires iOS | 26.1 | **26.0** |
| Devices | **iPhone, iPad, Mac, Apple Watch** | iPhone, iPad, Mac |
| Age rating | 4+ | 17+ |
| Developer | [Divyansh Divyansh](https://appshunter.io/developer/1870395698) | [Dakota Bullard](https://appshunter.io/developer/1865709291) |

## What reviewers say

### Polymath

[App page](https://appshunter.io/ios/app/polymath-think-plan-do/id6758142607)

**In-app purchases:** none


### Occam SI

[App page](https://appshunter.io/ios/app/occam-si/id6759069376)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Polymath free?

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

### Is Occam SI free?

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

### Do Polymath or Occam SI have ads?

Neither Polymath nor Occam SI shows ads.

### Which is updated more often, Polymath or Occam SI?

Polymath ships an update every 3 weeks, and Occam SI every 2 months. Most recently, Polymath was updated on October 5, 2026 and Occam SI on October 12, 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.*