# GreenBulb vs The Lettervan

The clearest difference is in-app purchases: The Lettervan at none against GreenBulb's 1. GreenBulb's advantage is iOS requirement (12.0 vs 14.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. GreenBulb sells 1 one-off in-app purchase. The Lettervan asks for nothing beyond the download.

GreenBulb ships an update weekly, The Lettervan every 4 days. The most recent releases landed on October 27, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | GreenBulb | The Lettervan |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (4 ratings)](https://appshunter.io/ios/app/the-lettervan/id6474092236/reviews)** |
| Number of ratings | — | **4** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Weekly | **Every 4 days** |
| Monetization | — | Paid |
| Size | 344 MB | 161 MB |
| Requires iOS | **12.0** | 14.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Daniel Green](https://appshunter.io/developer/1597520201) | [Rickard Paulsson](https://appshunter.io/developer/1720627898) |

## What reviewers say

### GreenBulb

[App page](https://appshunter.io/ios/app/greenbulb/id6472526846)

**Features:** macOS Compatibility, Game Controller support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock All Levels | $1.99 | one-time |


### The Lettervan

[App page](https://appshunter.io/ios/app/the-lettervan/id6474092236)

This educational game helps children develop phonemic awareness and spelling skills through interactive word challenges. Players navigate engaging scenarios while learning to identify and manipulate sounds within words, fostering reading and pronunciation proficiency.

**Highlights:** Phoneme recognition practice, Interactive spelling challenges, Word-based animations, Developed with speech pathologists, Engaging game scenarios

**In-app purchases:** none


## Frequently asked questions

### Is GreenBulb free?

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

### Is The Lettervan free?

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

### Do GreenBulb or The Lettervan have ads?

Neither GreenBulb nor The Lettervan shows ads.

### Which is updated more often, GreenBulb or The Lettervan?

GreenBulb ships an update weekly, and The Lettervan every 4 days. Most recently, GreenBulb was updated on October 27, 2026 and The Lettervan on October 24, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*