# 3D Geometry vs LUMO

The clearest difference is in-app purchases: LUMO at none against 3D Geometry's 1. LUMO also leads on iOS requirement (15.1 vs 17.0). 3D Geometry's advantage is update cadence (every 5 days vs every 11 days). On price, ads and device support there is nothing between them.

Both are free to download. 3D Geometry sells 1 one-off in-app purchase. LUMO asks for nothing beyond the download.

3D Geometry ships an update every 5 days, LUMO every 11 days. The most recent releases landed on October 25, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | 3D Geometry | LUMO |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (5 ratings)](https://appshunter.io/ios/app/lumo-learn-and-memorize/id6779151470/reviews)** |
| Number of ratings | — | **5** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 5 days** | Every 11 days |
| Monetization | — | Free |
| Size | 3 MB | 34 MB |
| Requires iOS | 17.0 | **15.1** |
| Devices | **iPhone, iPad, Mac** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [光浩 李](https://appshunter.io/developer/1576352133) | [Nadzeya Karpovich](https://appshunter.io/developer/6779151472) |

## What reviewers say

### 3D Geometry

[App page](https://appshunter.io/ios/app/3d-geometry-solids-and-sections/id6757910669)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 3D Geometry Pro | $5.99 | one-time |


### LUMO

[App page](https://appshunter.io/ios/app/lumo-learn-and-memorize/id6779151470)

Build vocabulary with personalized flashcards and instant translation. Organize words into custom collections, practice with various quiz modes, and track your learning progress. Study offline and sync across devices.

**Highlights:** Personalized flashcard decks, Instant translation, Customizable collections, Multiple quiz modes, Progress tracking, Offline study, Cross-device sync

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

**In-app purchases:** none


## Frequently asked questions

### Is 3D Geometry free?

3D Geometry is free to download, with in-app purchases available.

### Is LUMO free?

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

### Do 3D Geometry or LUMO have ads?

Neither 3D Geometry nor LUMO shows ads.

### Which is updated more often, 3D Geometry or LUMO?

3D Geometry ships an update every 5 days, and LUMO every 11 days. Most recently, 3D Geometry was updated on October 25, 2026 and LUMO on October 24, 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.*