# Learn Python in 21 Days vs Grammar Check Corrector +

The clearest difference is review sentiment: Grammar Check Corrector + at 89% against Learn Python in 21 Days's 0%. Grammar Check Corrector + also leads on rating (4.8 vs 4.5) and ratings volume (201 vs 17). Learn Python in 21 Days's advantage is ads (none vs shown) and iOS requirement (15 vs 17.6). On price, update cadence, in-app purchases and monetization model there is nothing between them.

Both are free to download. Learn Python in 21 Days sells 2 in-app purchases, starting at $9.99 per month and Grammar Check Corrector + sells 4 in-app purchases, starting at $3.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Grammar Check Corrector + holds the better App Store score, 4.8 against 4.5. That said, the two scores are not equally well evidenced: Grammar Check Corrector + has 201 ratings behind it against 17, so its average is the more settled of the two. Written reviews point the same way: 0% of Learn Python in 21 Days's written reviews are positive against 89% of Grammar Check Corrector +'s.

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on September 20, 2026 and September 13, 2026 respectively.

## The numbers

| Metric | Learn Python in 21 Days | Grammar Check Corrector + |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.5 (17 ratings)](https://appshunter.io/ios/app/learn-python-in-21-days/id6737173957/reviews) | **[4.8 (201 ratings)](https://appshunter.io/ios/app/grammar-check-corrector-plus/id6749162814/reviews)** |
| Number of ratings | 17 | **201** |
| Positive reviews | 0.0% of reviews | **88.9% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 2 months | Every 2 months |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 191 MB | 11 MB |
| Requires iOS | **15** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Adam Atamnia](https://appshunter.io/developer/1775084049) | [ENGINES STUDIO LAB](https://appshunter.io/developer/1686902830) |

## What reviewers say

### Learn Python in 21 Days

[App page](https://appshunter.io/ios/app/learn-python-in-21-days/id6737173957)

Master Python programming with interactive lessons covering variables, data types, loops, functions, and more. Practice coding directly within the app and explore advanced topics like error handling and object-oriented programming.

**Highlights:** Variables, indentation, and comments, Data types: int, float, str, bool, list, tuple, set, dict, Control flow: conditions and loops, Functions and modules, Error handling and class basics, In-app coding practice

**Features:** Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Full Access | $9.99 | per month |
| Lifetime Full Access | $19.99 | one-time |


### Grammar Check Corrector +

[App page](https://appshunter.io/ios/app/grammar-check-corrector-plus/id6749162814)

This writing assistant helps you eliminate errors and improve your text. It offers advanced grammar and spelling checks, synonym suggestions, and definitions to refine your vocabulary. Review your editing history and enjoy a user-friendly interface with dark mode.

**Highlights:** Advanced grammar and spelling checker, Import text from PDFs, Synonym finder and word choice improvement, Word definitions, Editing history review, Dark Mode support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium access for 1 week | $3.99 | per 7 days |
| Premium access for 1 month | $12.99 | per month |
| Premium access for 1 year | $29.99 | per year |
| Premium access forever | $24.99 | one-time |


## Frequently asked questions

### Is Learn Python in 21 Days free?

Learn Python in 21 Days is free to download, with in-app purchases available.

### Is Grammar Check Corrector + free?

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

### Which has better reviews, Learn Python in 21 Days or Grammar Check Corrector +?

Grammar Check Corrector + is rated higher. Learn Python in 21 Days averages 4.5 out of 5 from 17 ratings, while Grammar Check Corrector + averages 4.8 from 201 ratings.

### Do Learn Python in 21 Days or Grammar Check Corrector + have ads?

Grammar Check Corrector + shows ads; Learn Python in 21 Days does not.

### Which is updated more often, Learn Python in 21 Days or Grammar Check Corrector +?

Learn Python in 21 Days ships an update every 2 months, and Grammar Check Corrector + every 2 months. Most recently, Learn Python in 21 Days was updated on September 20, 2026 and Grammar Check Corrector + on September 13, 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.*