# EnviroSpellathon vs Comprehension Builder.

The clearest difference is in-app purchases: EnviroSpellathon at none against Comprehension Builder.'s 3. EnviroSpellathon also leads on update cadence (every 6 weeks vs every 47 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Comprehension Builder. sells 3 one-off in-app purchases. EnviroSpellathon asks for nothing beyond the download.

EnviroSpellathon ships an update every 6 weeks, Comprehension Builder. every 47 months. The most recent releases landed on October 1, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | EnviroSpellathon | Comprehension Builder. |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[2.0 (2 ratings)](https://appshunter.io/ios/app/comprehension-builder/id1238808362/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 6 weeks** | Every 47 months |
| Monetization | — | Free with in-app purchases |
| Size | 112 MB | 50 MB |
| Requires iOS | **12.0** | 12.2 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [EAD](https://appshunter.io/developer/796827636) | [Janine Toole](https://appshunter.io/developer/839832427) |

## What reviewers say

### EnviroSpellathon

[App page](https://appshunter.io/ios/app/envirospellathon/id1179331407)

**In-app purchases:** none


### Comprehension Builder.

[App page](https://appshunter.io/ios/app/comprehension-builder/id1238808362)

This app helps users improve reading comprehension, working memory, and the ability to answer questions about text. It features incremental learning with texts that increase in length and difficulty as skills develop, along with a reward system for motivation. Designed for learners of all ages, including those with special needs or learning English.

**Highlights:** Passage comprehension practice, Working memory development, Answering multiple-choice questions, Incremental learning levels, Reward Center for motivation, 200+ fiction and non-fiction texts, Content designed by teachers

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Two Users | $1.99 | one-time |
| All Levels | $3.99 | one-time |
| 10 Users | $3.99 | one-time |


## Frequently asked questions

### Is EnviroSpellathon free?

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

### Is Comprehension Builder. free?

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

### Do EnviroSpellathon or Comprehension Builder. have ads?

Neither EnviroSpellathon nor Comprehension Builder. shows ads.

### Which is updated more often, EnviroSpellathon or Comprehension Builder.?

EnviroSpellathon ships an update every 6 weeks, and Comprehension Builder. every 47 months. Most recently, EnviroSpellathon was updated on October 1, 2026 and Comprehension Builder. on October 6, 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.*