# Spacify vs World Words

The clearest difference is review sentiment: World Words at 100% against Spacify's 86%. World Words also leads on iOS requirement (15.3 vs 18.0). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Spacify sells 3 in-app purchases, starting at $2.99 per month and World Words sells 3 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.

Both ship on a similar rhythm, roughly every 3 weeks. The most recent releases landed on September 23, 2026 and September 12, 2026 respectively.

## The numbers

| Metric | Spacify | World Words |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (5 ratings)](https://appshunter.io/ios/app/world-words/id1670569128/reviews)** |
| Number of ratings | — | **5** |
| Positive reviews | 85.7% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | Every 3 weeks |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 31 MB | 91 MB |
| Requires iOS | 18.0 | **15.3** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Denis Semenov](https://appshunter.io/developer/1441647112) | [Uliana Gritchina](https://appshunter.io/developer/1619495556) |

## What reviewers say

### Spacify

[App page](https://appshunter.io/ios/app/spacify-learn-and-remember/id1441647113)

This app helps you retain information by creating smart flashcards. It uses a scientifically proven spaced repetition algorithm to optimize memorization and offers a minimalist design to minimize distractions. Learn and remember anything, from vocabulary to complex facts, with this efficient study tool.

**Highlights:** Create smart flashcards, Spaced Repetition algorithm, iCloud sync & backup, Minimalist design, Rich text editor, Offline and online functionality

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Subscription | $2.99 | per month |
| 3 Months Subscription | $2.99 | per 3 months |
| Annual Subscription | $19.99 | per year |


### World Words

[App page](https://appshunter.io/ios/app/world-words/id1670569128)

Master foreign vocabulary with personalized flashcards and interactive tests. Contribute to a global learning community by sharing and discovering new words. Practice daily with home screen widgets.

**Highlights:** Create custom flashcards, Take knowledge consolidation tests, Learn words from a global community, Share vocabulary with others, Use home screen widgets for daily practice

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| World Words Premium | $0.99 | per month |
| World Words Premium Annual | $9.99 | per year |
| Add 100 cards | $0.69 | one-time |


## Frequently asked questions

### Is Spacify free?

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

### Is World Words free?

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

### Do Spacify or World Words have ads?

Neither Spacify nor World Words shows ads.

### Which is updated more often, Spacify or World Words?

Spacify ships an update every 3 weeks, and World Words every 3 weeks. Most recently, Spacify was updated on September 23, 2026 and World Words on September 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.*