# Probability Toolkit vs LatinOpus

The clearest difference is update cadence: LatinOpus at every 6 weeks against Probability Toolkit's every 10 months. LatinOpus also leads on chart position (#193 vs unranked) and device support (4 vs 1). Probability Toolkit's advantage is price ($1.99 vs $5.99) and iOS requirement (12.0 vs 15.6). On ads and in-app purchases there is nothing between them.

Probability Toolkit costs $1.99 and LatinOpus $5.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Probability Toolkit ships an update every 10 months, LatinOpus every 6 weeks. The most recent releases landed on May 17, 2026 and August 15, 2026 respectively.

## The numbers

| Metric | Probability Toolkit | LatinOpus |
| --- | --- | --- |
| Price | **$1.99** | $5.99 |
| Rating | — | **[4.3 (3 ratings)](https://appshunter.io/ios/app/latinopus-henle/id1644733035/reviews)** |
| Number of ratings | — | **3** |
| Positive reviews | — | 83.3% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 10 months | **Every 6 weeks** |
| Monetization | — | Paid |
| Best chart rank | — | **#193** |
| Size | 41 MB | 26 MB |
| Requires iOS | **12.0** | 15.6 |
| Devices | iPad | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Ventura Educational Systems](https://appshunter.io/developer/371324172) | [PIRUX, LLC](https://appshunter.io/developer/1618629503) |

## What reviewers say

### Probability Toolkit

[App page](https://appshunter.io/ios/app/probability-toolkit/id652216774)

**Features:** macOS Compatibility

**In-app purchases:** none


### LatinOpus

[App page](https://appshunter.io/ios/app/latinopus-henle/id1644733035)

**Currently charting:** #193 Top Paid · Education (US App Store)

Master Latin vocabulary with digital flashcards designed for Henle Latin students. Practice specific units or lessons, refine your knowledge in both directions, and track your progress with detailed statistics. Focus on learning without ads or tracking.

**Highlights:** Digital flashcards for Henle Latin, Practice by unit or lesson, Latin to English and English to Latin practice, Customizable practice lists, Self-quizzes with score tracking, Detailed statistics on progress

**In-app purchases:** none


## Frequently asked questions

### Is Probability Toolkit free?

Probability Toolkit costs $1.99, with no in-app purchases.

### Is LatinOpus free?

LatinOpus costs $5.99, with no in-app purchases.

### Do Probability Toolkit or LatinOpus have ads?

Neither Probability Toolkit nor LatinOpus shows ads.

### Which is updated more often, Probability Toolkit or LatinOpus?

Probability Toolkit ships an update every 10 months, and LatinOpus every 6 weeks. Most recently, Probability Toolkit was updated on May 17, 2026 and LatinOpus on August 15, 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.*