# English Phrase Book Learn vs Arbitrary Triangle PRO

The clearest difference is update cadence: Arbitrary Triangle PRO at every 3 weeks against English Phrase Book Learn's every 11 months. Arbitrary Triangle PRO also leads on rating (5.0 vs 4.6). English Phrase Book Learn's advantage is ratings volume (11 vs 1) and price ($1.99 vs $2.99). On ads, in-app purchases, monetization model and device support there is nothing between them.

English Phrase Book Learn costs $1.99 and Arbitrary Triangle PRO $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Arbitrary Triangle PRO holds the better App Store score, 5.0 against 4.6. That said, the two scores are not equally well evidenced: English Phrase Book Learn has 11 ratings behind it against 1, so its average is the more settled of the two.

English Phrase Book Learn ships an update every 11 months, Arbitrary Triangle PRO every 3 weeks. The most recent releases landed on October 24, 2026 and October 21, 2026 respectively.

## The numbers

| Metric | English Phrase Book Learn | Arbitrary Triangle PRO |
| --- | --- | --- |
| Price | **$1.99** | $2.99 |
| Rating | [4.6 (11 ratings)](https://appshunter.io/ios/app/english-phrase-book-learn/id1146269500/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/arbitrary-triangle-pro/id1617819308/reviews)** |
| Number of ratings | **11** | 1 |
| Positive reviews | 75.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 11 months | **Every 3 weeks** |
| Monetization | Paid | Paid |
| Size | 47 MB | 182 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | +4 | 4+ |
| Developer | [佩佩 伍](https://appshunter.io/developer/917259251) | [Glindemann, Sennoun, Langer GbR](https://appshunter.io/developer/1024972809) |

## What reviewers say

### English Phrase Book Learn

[App page](https://appshunter.io/ios/app/english-phrase-book-learn/id1146269500)

Master essential English phrases with effective training methods and voiceprint comparison for pronunciation correction. This app offers offline access to a wide range of categorized phrases for daily life, travel, and more.

**Highlights:** Classified phrases, Effective training methods, Voiceprint comparison for pronunciation, Offline operation, Audio player, Extensive phrase categories

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

**In-app purchases:** none


### Arbitrary Triangle PRO

[App page](https://appshunter.io/ios/app/arbitrary-triangle-pro/id1617819308)

This app calculates all unknown quantities of an arbitrary triangle. It displays the formulas used and provides step-by-step solutions, supporting decimals and fractions. Calculations are saved in history and can be shared.

**Highlights:** Calculates all triangle quantities, Displays formulas used, Step-by-step solutions, Supports decimals and fractions, Calculation history, Shareable solutions

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

**In-app purchases:** none


## Frequently asked questions

### Is English Phrase Book Learn free?

English Phrase Book Learn costs $1.99, with no in-app purchases.

### Is Arbitrary Triangle PRO free?

Arbitrary Triangle PRO costs $2.99, with no in-app purchases.

### Which has better reviews, English Phrase Book Learn or Arbitrary Triangle PRO?

Arbitrary Triangle PRO is rated higher. English Phrase Book Learn averages 4.6 out of 5 from 11 ratings, while Arbitrary Triangle PRO averages 5.0 from 1 ratings.

### Do English Phrase Book Learn or Arbitrary Triangle PRO have ads?

Neither English Phrase Book Learn nor Arbitrary Triangle PRO shows ads.

### Which is updated more often, English Phrase Book Learn or Arbitrary Triangle PRO?

English Phrase Book Learn ships an update every 11 months, and Arbitrary Triangle PRO every 3 weeks. Most recently, English Phrase Book Learn was updated on October 24, 2026 and Arbitrary Triangle PRO on October 21, 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.*