# Factoring Quadratics PRO vs Nihongo Lessons

The clearest difference is price: Nihongo Lessons at Free against Factoring Quadratics PRO's $1.99. Nihongo Lessons also leads on rating (4.8 vs 4.3) and ratings volume (126 vs 13). Factoring Quadratics PRO's advantage is in-app purchases (none vs 13) and device support (3 vs 1). On update cadence and ads there is nothing between them.

Nihongo Lessons is free to download; Factoring Quadratics PRO costs $1.99 up front. Nihongo Lessons sells 13 in-app purchases, starting at $4.99 per month. Factoring Quadratics PRO asks for nothing beyond the download.

Nihongo Lessons holds the better App Store score, 4.8 against 4.3. That said, the two scores are not equally well evidenced: Nihongo Lessons has 126 ratings behind it against 13, so its average is the more settled of the two. Written reviews point the same way: 75% of Factoring Quadratics PRO's written reviews are positive against 85% of Nihongo Lessons's.

Factoring Quadratics PRO ships an update monthly, Nihongo Lessons every 3 weeks. Both last shipped on September 14, 2026.

## The numbers

| Metric | Factoring Quadratics PRO | Nihongo Lessons |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Rating | [4.3 (13 ratings)](https://appshunter.io/ios/app/factoring-quadratics-pro/id1494505052/reviews) | **[4.8 (126 ratings)](https://appshunter.io/ios/app/nihongo-lessons/id1640204242/reviews)** |
| Number of ratings | 13 | **126** |
| Positive reviews | 75.0% of reviews | **84.8% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Every 3 weeks** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 179 MB | 258 MB |
| Requires iOS | **15.0** | 17 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Glindemann, Sennoun, Langer GbR](https://appshunter.io/developer/1024972809) | [Serpenti Sei Japan](https://appshunter.io/developer/1767544234) |

## What reviewers say

### Factoring Quadratics PRO

[App page](https://appshunter.io/ios/app/factoring-quadratics-pro/id1494505052)

This app helps users factor quadratic trinomials by entering three variables. It provides detailed solution steps and stores all calculations in a history that can be managed and shared.

**Highlights:** Factors quadratic trinomials, Detailed solution steps, History of calculations, Supports positive/negative numbers and decimals, Shareable solutions, Input validation

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

**In-app purchases:** none


### Nihongo Lessons

[App page](https://appshunter.io/ios/app/nihongo-lessons/id1640204242)

This app helps learners of all levels achieve Japanese fluency. It uses a flashcard format to teach vocabulary, grammar, and writing systems, with advanced spaced repetition for effective retention. Content is sourced from real manga for advanced learners.

**Highlights:** Learn Hiragana and Katakana, 7000+ handcrafted sentences, Professional voice actor audio, Advanced Spaced Repetition System (SRS), Vocabulary and grammar from manga, Flashcard learning format

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

**In-app purchases (13)**

| Purchase | Price | Billing |
| --- | --- | --- |
| All Access Monthly | $4.99 | per month |
| All Access Yearly | $49.99 | per year |
| Beginner Deck (Discounted) | $59.99 | one-time |
| Champion Deck (Discounted) | $59.99 | one-time |
| Expert Deck (Discounted) | $59.99 | one-time |
| Master Deck (Discounted) | $59.99 | one-time |
| Intermediate Deck (Discounted) | $83.99 | one-time |
| Beginner Deck (Discounted) | $101.99 | one-time |
| Beginner Deck | $119.99 | one-time |
| All Decks (Discounted) | $149.99 | one-time |
| All Decks (Discounted) | $254.99 | one-time |
| All Decks | $299.99 | one-time |
| All Decks (Discounted) | $299.99 | one-time |


## Frequently asked questions

### Is Factoring Quadratics PRO free?

Factoring Quadratics PRO costs $1.99, with no in-app purchases.

### Is Nihongo Lessons free?

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

### Which has better reviews, Factoring Quadratics PRO or Nihongo Lessons?

Nihongo Lessons is rated higher. Factoring Quadratics PRO averages 4.3 out of 5 from 13 ratings, while Nihongo Lessons averages 4.8 from 126 ratings.

### Do Factoring Quadratics PRO or Nihongo Lessons have ads?

Neither Factoring Quadratics PRO nor Nihongo Lessons shows ads.

### Which is updated more often, Factoring Quadratics PRO or Nihongo Lessons?

Factoring Quadratics PRO ships an update monthly, and Nihongo Lessons every 3 weeks. Most recently, Factoring Quadratics PRO was updated on September 14, 2026 and Nihongo Lessons on September 14, 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.*