# Grammar vs BIBOL APP

The clearest difference is in-app purchases: BIBOL APP at none against Grammar's 1. BIBOL APP also leads on update cadence (every 4 weeks vs every 13 months) and iOS requirement (12.0 vs 15.0). On price, ads and device support there is nothing between them.

Both are free to download. Grammar sells 1 one-off in-app purchase. BIBOL APP asks for nothing beyond the download.

Grammar ships an update every 13 months, BIBOL APP every 4 weeks. The most recent releases landed on November 9, 2026 and November 7, 2026 respectively.

## The numbers

| Metric | Grammar | BIBOL APP |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (4 ratings)](https://appshunter.io/ios/app/grammar-active-passive-voice/id369359532/reviews)** | — |
| Number of ratings | **4** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 13 months | **Every 4 weeks** |
| Monetization | Free | — |
| Size | 15 MB | 42 MB |
| Requires iOS | 15.0 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Webrich Software Limited](https://appshunter.io/developer/290203591) | [Chanthavilay BOUNTHALA](https://appshunter.io/developer/1525693462) |

## What reviewers say

### Grammar

[App page](https://appshunter.io/ios/app/grammar-active-passive-voice/id369359532)

Master sentence transformations between active and passive voice with comprehensive lessons, examples, and quizzes. Improve your English writing by introducing variety and understanding grammar rules. Track your progress with detailed results and visual charts.

**Highlights:** Comprehensive grammar lessons and rules, Over 100 examples with explanations, Multiple-choice quizzes with feedback, Progress tracking with pie charts, Customizable timer settings, Randomized question algorithm

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Full Question Bank | $2.99 | one-time |


### BIBOL APP

[App page](https://appshunter.io/ios/app/bibol-app/id1588561690)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Grammar free?

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

### Is BIBOL APP free?

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

### Do Grammar or BIBOL APP have ads?

Neither Grammar nor BIBOL APP shows ads.

### Which is updated more often, Grammar or BIBOL APP?

Grammar ships an update every 13 months, and BIBOL APP every 4 weeks. Most recently, Grammar was updated on November 9, 2026 and BIBOL APP on November 7, 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.*