# 100 Things You Should Know — Learn, quiz & master 100 facts

> Learn, quiz & master 100 facts (iPhone/iPad app by Thomas Richardson.)

- Source: https://appshunter.io/ios/app/100-things-you-should-know/id6803039123 (this page in markdown: same URL + `.md`)
- Developer: [Thomas Richardson](https://appshunter.io/developer/1887851473)
- Category: Education, Reference
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 17.0 · 1 MB
- Languages: American English
- Released: 2026-08-23
- Data updated: 2026-08-29
- User reviews in markdown: https://appshunter.io/ios/app/100-things-you-should-know/id6803039123/reviews.md

## What is 100 Things You Should Know?

How much do you actually know?

100 Things You Should Know turns general knowledge into something you can see, test and complete.

Each subject is a finite set of exactly 100 essential ideas. Start with World included, then unlock Science, History, Money, Language, Music and Technology as one-time packs.

Every pack gives you:

• A 100-item knowledge map that fills as you learn
• A quick self-assessment to find what you already know
• Clear explanations, examples and memory hooks
• Learn mode for focused practice
• Quickfire, True or False, What Am I? and Knockout challenges
• Mastery tracking that highlights weak areas and what to revisit next

The goal is not to read another textbook. It is to find out what you know, discover what you do not, and watch the gaps disappear.

World is included with the app. Additional subject packs are optional one-time in-app purchases. There are no subscriptions.

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Science Pack | $1.99 | one-time |
| History Pack | $1.99 | one-time |
| Money Pack | $1.99 | one-time |
| Language Pack | $1.99 | one-time |
| Technology Pack | $1.99 | one-time |
| Music Pack | $1.99 | one-time |



## Version history (last 1 release)

### 1.0 — 2026-08-24

No release notes.

## More apps by Thomas Richardson

- [Subscription Hub](https://appshunter.io/ios/app/subscription-hub/id6761115996)
- [L.E.A.R.N.](https://appshunter.io/ios/app/learn/id6761297766)
- [CompassPin](https://appshunter.io/ios/app/compasspin/id6761366759)
- [SplitFlap Display](https://appshunter.io/ios/app/splitflap-display/id6761390167)
- [SpotRadar](https://appshunter.io/ios/app/spotradar/id6761439820)
- [TypeFold](https://appshunter.io/ios/app/typefold/id6761461760)

All apps by Thomas Richardson: https://appshunter.io/developer/1887851473

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-29.*