# COCA词频单词 vs Bernoulli Trial

The clearest difference is price: Bernoulli Trial at Free against COCA词频单词's $2.99. Bernoulli Trial also leads on update cadence (every 3 weeks vs every 6 weeks). COCA词频单词's advantage is in-app purchases (none vs 8) and iOS requirement (11.0 vs 15.0). On ads and device support there is nothing between them.

Bernoulli Trial is free to download; COCA词频单词 costs $2.99 up front. Bernoulli Trial sells 8 one-off in-app purchases. COCA词频单词 asks for nothing beyond the download.

COCA词频单词 ships an update every 6 weeks, Bernoulli Trial every 3 weeks. The most recent releases landed on November 3, 2026 and November 4, 2026 respectively.

## The numbers

| Metric | COCA词频单词 | Bernoulli Trial |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/bernoulli-trial/id6472449129/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | 42.9% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Every 3 weeks** |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 105 MB | 180 MB |
| Requires iOS | **11.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [坤 徐](https://appshunter.io/developer/1490871013) | [Glindemann, Sennoun, Langer GbR](https://appshunter.io/developer/1024972809) |

## What reviewers say

### COCA词频单词

[App page](https://appshunter.io/ios/app/coca/id1490871014)

Master English vocabulary with a frequency-based approach. This app provides detailed explanations, synonyms, and example sentences for thousands of the most common words, aiding efficient learning and retention.

**Highlights:** 17,631 COCA-ranked words, Detailed explanations, synonyms, and examples, Audio pronunciation, Grouped learning by 1000-word intervals, Offline dictionary access, Progress tracking and learned word filtering

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

**In-app purchases:** none


### Bernoulli Trial

[App page](https://appshunter.io/ios/app/bernoulli-trial/id6472449129)

Instantly solve math homework and prepare for exams with step-by-step solutions. Calculate probabilities, expected values, variance, and standard deviation for Bernoulli trials. Includes histograms, distribution functions, and learning videos.

**Highlights:** Step-by-step math solutions, Bernoulli trial probability calculation, Expected value, variance, standard deviation, Histogram and distribution function, Curated learning videos, Feedback on incorrect inputs

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

**In-app purchases (8)**

| Purchase | Price | Billing |
| --- | --- | --- |
| +30 User Tokens | $0.29 | one-time |
| +1 Convenience Token / 6h, max. +2 | $0.59 | one-time |
| +150 User Tokens | $0.99 | one-time |
| +2 Convenience Tokens / 6h, max. +4 | $0.99 | one-time |
| +300 User Tokens | $1.49 | one-time |
| +4 Convenience Tokens / 6h, max. +8 | $1.59 | one-time |
| Lifetime Access | $1.99 | one-time |
| Remove Ads | $1.99 | one-time |


## Frequently asked questions

### Is COCA词频单词 free?

COCA词频单词 costs $2.99, with no in-app purchases.

### Is Bernoulli Trial free?

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

### Do COCA词频单词 or Bernoulli Trial have ads?

Neither COCA词频单词 nor Bernoulli Trial shows ads.

### Which is updated more often, COCA词频单词 or Bernoulli Trial?

COCA词频单词 ships an update every 6 weeks, and Bernoulli Trial every 3 weeks. Most recently, COCA词频单词 was updated on November 3, 2026 and Bernoulli Trial on November 4, 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.*