# IELTS Prep App vs Petroleum Engineering+

The clearest difference is ads: Petroleum Engineering+ at none against IELTS Prep App's shown. Petroleum Engineering+ also leads on rating (5.0 vs 4.7). IELTS Prep App's advantage is ratings volume (710 vs 1) and iOS requirement (15.0 vs 17.0). On price, update cadence, in-app purchases and monetization model there is nothing between them.

Both are free to download. IELTS Prep App sells 15 in-app purchases, starting at $4.99 per 7 days and Petroleum Engineering+ sells 6 in-app purchases, starting at $9.99 per month. Whichever you choose, the download price is not the number that matters.

Petroleum Engineering+ holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: IELTS Prep App has 710 ratings behind it against 1, so its average is the more settled of the two.

IELTS Prep App ships an update every 4 weeks, Petroleum Engineering+ monthly. The most recent releases landed on October 15, 2026 and September 23, 2026 respectively.

## The numbers

| Metric | IELTS Prep App | Petroleum Engineering+ |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.7 (710 ratings)](https://appshunter.io/ios/app/ielts-prep-app/id6474507150/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/petroleum-engineering-plus/id6746214573/reviews)** |
| Number of ratings | **710** | 1 |
| Positive reviews | 78.6% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | **Every 4 weeks** | Monthly |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 214 MB | 18 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Aleksei Naumov](https://appshunter.io/developer/1011826778) | [Forwa Elade Wunde](https://appshunter.io/developer/1685241344) |

## What reviewers say

### IELTS Prep App

[App page](https://appshunter.io/ios/app/ielts-prep-app/id6474507150)

Prepare for the IELTS exam with a comprehensive assistant. Improve vocabulary, writing, listening, and speaking skills through interactive lessons, practice tests, and expert strategies. Master all test sections for both Academic and General modules.

**Highlights:** IELTS practice tests, Interactive lessons and exercises, Expert tips and strategies, Writing prompts tool, Reading comprehension exercises, Listening and speaking practice, Vocabulary building resources

**In-app purchases (15)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Premium Access | $4.99 | per 7 days |
| Weekly Premium Access + Trial | $4.99 | per 7 days |
| Weekly Premium Access | $5.99 | per 7 days |
| Weekly Premium Access + Trial | $5.99 | per 7 days |
| Monthly Premium Access + Trial | $12.99 | per month |
| Monthly Premium Access | $12.99 | per month |
| Monthly Premium Access | $14.99 | per month |
| Monthly Premium Access + Trial | $14.99 | per month |
| Annual Premium Access + Trial | $39.99 | per year |
| Annual Premium Access + Trial | $49.99 | per year |
| Annual Premium Access | $49.99 | per year |
| Annual Premium Access | $59.99 | per year |
| Annual Premium Access + Trial | $59.99 | per year |
| Lifetime Premium Access | $79.99 | one-time |
| Lifetime Premium Access | $99.99 | one-time |

**What reviewers like**

- 📚 Comprehensive IELTS preparation materials
- ✅ Well-structured content with clear progression
- 🎯 Realistic exam-like practice questions
- 💡 Helpful tips and strategies for all sections
- 🆓 Free access to extensive exercises

**What reviewers complain about**

- 💳 Premium purchase sync issues with Apple accounts
- ❌ Difficult subscription cancellation process
- 📱 Mobile-only version causes physical strain
- 📺 Excessive ads interrupting learning experience
- 🔧 Buggy ad closing mechanism

**Reported bugs**

- Premium purchase cancels when connecting to Apple account
- Premium status not retained after account disconnection
- No cancellation option visible in app during trial
- Ad close button (X) doesn't appear after watching ads

**Requested features**

- Desktop or web version for longer study sessions
- Improved subscription management within app
- Better ad frequency controls


### Petroleum Engineering+

[App page](https://appshunter.io/ios/app/petroleum-engineering-plus/id6746214573)

Master petroleum engineering concepts through engaging quizzes covering a wide range of topics from geology to production. Ideal for students and professionals seeking to enhance their knowledge and skills in the oil and gas industry.

**Highlights:** Comprehensive quiz coverage, Topics from geology to production, Boost knowledge and skills, Engaging learning experience, Suitable for students and professionals

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

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1 Month | $9.99 | per month |
| 6 Months | $19.99 | per 6 months |
| 1 Year | $29.99 | per year |
| 1500 | $0.99 | one-time |
| 3500 | $1.99 | one-time |
| 9000 | $3.99 | one-time |


## Frequently asked questions

### Is IELTS Prep App free?

IELTS Prep App is free to download, with in-app purchases available.

### Is Petroleum Engineering+ free?

Petroleum Engineering+ is free to download, with in-app purchases available.

### Which has better reviews, IELTS Prep App or Petroleum Engineering+?

Petroleum Engineering+ is rated higher. IELTS Prep App averages 4.7 out of 5 from 710 ratings, while Petroleum Engineering+ averages 5.0 from 1 ratings.

### Do IELTS Prep App or Petroleum Engineering+ have ads?

IELTS Prep App shows ads; Petroleum Engineering+ does not.

### Which is updated more often, IELTS Prep App or Petroleum Engineering+?

IELTS Prep App ships an update every 4 weeks, and Petroleum Engineering+ monthly. Most recently, IELTS Prep App was updated on October 15, 2026 and Petroleum Engineering+ on September 23, 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.*