# Hypothesis vs Knowledge Base

The clearest difference is device support: Hypothesis at 3 against Knowledge Base's 1. Hypothesis also leads on iOS requirement (15.0 vs 26.4). On price, update cadence, ads and in-app purchases there is nothing between them.

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

Hypothesis ships an update every 2 weeks, Knowledge Base weekly. The most recent releases landed on October 9, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | Hypothesis | Knowledge Base |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 weeks | **Weekly** |
| Monetization | Free | — |
| Size | 56 MB | 9 MB |
| Requires iOS | **15.0** | 26.4 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [van squared](https://appshunter.io/developer/1063072271) | [CHANG CHIA-WEI](https://appshunter.io/developer/1804812181) |

## What reviewers say

### Hypothesis

[App page](https://appshunter.io/ios/app/hypothesis/id1460571224)

This app presents a new question daily, allowing users to anonymously share their opinions. Users can track how their viewpoints evolve over time and compare their thoughts to the majority.

**Highlights:** Daily new questions, Anonymous opinion sharing, Track opinion changes, Compare with masses, Quick and easy to use

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

**In-app purchases:** none


### Knowledge Base

[App page](https://appshunter.io/ios/app/knowledge-base-second-brain/id6785236967)

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

**In-app purchases:** none


## Frequently asked questions

### Is Hypothesis free?

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

### Is Knowledge Base free?

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

### Do Hypothesis or Knowledge Base have ads?

Neither Hypothesis nor Knowledge Base shows ads.

### Which is updated more often, Hypothesis or Knowledge Base?

Hypothesis ships an update every 2 weeks, and Knowledge Base weekly. Most recently, Hypothesis was updated on October 9, 2026 and Knowledge Base 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.*