# NineOut Trivia vs KnowDown

The clearest difference is in-app purchases: KnowDown at none against NineOut Trivia's 5. KnowDown also leads on ads (none vs shown). On price, update cadence, device support and iOS requirement there is nothing between them.

Both are free to download. NineOut Trivia sells 5 in-app purchases, starting at $2.99 per month. KnowDown asks for nothing beyond the download.

Both ship on a similar rhythm, roughly weekly. The most recent releases landed on October 16, 2026 and October 21, 2026 respectively.

## The numbers

| Metric | NineOut Trivia | KnowDown |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/knowdown/id6761421487/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Weekly | Weekly |
| Monetization | — | Free |
| Size | 206 MB | 35 MB |
| Requires iOS | 15.1 | 15.1 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 12+ | 4+ |
| Developer | [ABDOU MAKHTAR DIAKHATE](https://appshunter.io/developer/1872347263) | [Niklas Debbrecht](https://appshunter.io/developer/1889520130) |

## What reviewers say

### NineOut Trivia

[App page](https://appshunter.io/ios/app/nineout-trivia/id6758777712)

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

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| NineOut Premium | $2.99 | per month |
| Starter Pack | $0.99 | one-time |
| Starter Pack — 500 Neurons | $1.99 | one-time |
| Brain Pack — 1500 Neurons | $3.99 | one-time |
| Genius Pack — 4500 Neurons | $8.99 | one-time |


### KnowDown

[App page](https://appshunter.io/ios/app/knowdown/id6761421487)

A trivia game that measures your knowledge with an ELO rating system. Answer questions across various categories, compete on global leaderboards, and learn from your mistakes. Offers daily limits and streak bonuses.

**Highlights:** ELO rating system for skill measurement, 700+ curated trivia questions, Global leaderboards, Smart matchmaking based on ELO, Daily question limit, Day streaks and awards, Answer history for learning

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

**In-app purchases:** none


## Frequently asked questions

### Is NineOut Trivia free?

NineOut Trivia is free to download, with in-app purchases available.

### Is KnowDown free?

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

### Do NineOut Trivia or KnowDown have ads?

NineOut Trivia shows ads; KnowDown does not.

### Which is updated more often, NineOut Trivia or KnowDown?

NineOut Trivia ships an update weekly, and KnowDown weekly. Most recently, NineOut Trivia was updated on October 16, 2026 and KnowDown on October 21, 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.*