# Flippy vs Boo World

The clearest difference is device support: Flippy at 6 against Boo World's 2. Boo World's advantage is iOS requirement (15.0 vs 26.0). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Flippy sells 10 in-app purchases, starting at $2.99 per 3 months and Boo World sells 3 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

Flippy ships an update every 9 days, Boo World every 6 days. The most recent releases landed on November 7, 2026 and October 29, 2026 respectively.

## The numbers

| Metric | Flippy | Boo World |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (20 ratings)](https://appshunter.io/ios/app/flippy-learn-flashcards/id1522268839/reviews)** | — |
| Number of ratings | **20** | — |
| Positive reviews | 59.3% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 9 days | **Every 6 days** |
| Monetization | Freemium | — |
| Size | 107 MB | 30 MB |
| Requires iOS | 26.0 | **15.0** |
| Devices | **iPhone, iPad, Mac, Apple TV, Apple Watch, Vision Pro** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Kevin Reutter](https://appshunter.io/developer/1273424431) | [Ahrorbek Mirzaev](https://appshunter.io/developer/1726150909) |

## What reviewers say

### Flippy

[App page](https://appshunter.io/ios/app/flippy-learn-flashcards/id1522268839)

This app uses smart algorithms and ARKit to help you learn languages and facts more effectively. It offers personalized learning sessions, intuitive flashcard interaction, and smart reminders to reinforce your knowledge.

**Highlights:** Generated personalized learning sessions, Intuitive swipe-based flashcard interface, ARKit eye-tracking for focus (select devices), Import or create custom flashcards, Smart spaced repetition reminders, Leitner system algorithm, Detailed progress statistics

**Features:** Family Sharing, Apple Watch app

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium - 3 Months | $2.99 | per 3 months |
| Flippy+ 3 Months | $3.99 | per 3 months |
| Premium Monthly | $3.99 | per month |
| Family Flippy+ 3 Months | $6.99 | per 3 months |
| Premium - Annual | $7.99 | per year |
| PremiumAnnualOffering | $9.99 | per year |
| Flippy+ Annual | $24.99 | per year |
| Family Flippy+ (Annual) | $39.99 | per year |
| Flippy+ Lifetime | $59.99 | one-time |
| Family Flippy+ Lifetime | $99.99 | one-time |


### Boo World

[App page](https://appshunter.io/ios/app/boo-world/id6809162679)

**Features:** Family Sharing

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Monthly | $4.99 | per month |
| Premium Yearly | $29.99 | per year |
| Premium Forever | $59.99 | one-time |


## Frequently asked questions

### Is Flippy free?

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

### Is Boo World free?

Boo World is free to download, with in-app purchases available.

### Do Flippy or Boo World have ads?

Neither Flippy nor Boo World shows ads.

### Which is updated more often, Flippy or Boo World?

Flippy ships an update every 9 days, and Boo World every 6 days. Most recently, Flippy was updated on November 7, 2026 and Boo World on October 29, 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.*