# IELTS Collocation PRO vs DataStructureAndAlgorithm

The clearest difference is in-app purchases: DataStructureAndAlgorithm at none against IELTS Collocation PRO's 1. DataStructureAndAlgorithm also leads on price ($7.99 vs $8.99). IELTS Collocation PRO's advantage is iOS requirement (10.3 vs 16.3). On update cadence, ads and device support there is nothing between them.

IELTS Collocation PRO costs $8.99 and DataStructureAndAlgorithm $7.99 up front. IELTS Collocation PRO sells 1 one-off in-app purchase. DataStructureAndAlgorithm asks for nothing beyond the download.

Both ship on a similar rhythm, roughly every 3 months. The most recent releases landed on October 7, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | IELTS Collocation PRO | DataStructureAndAlgorithm |
| --- | --- | --- |
| Price | $8.99 | **$7.99** |
| Rating | **[4.8 (662 ratings)](https://appshunter.io/ios/app/ielts-collocation-pro/id1422950549/reviews)** | — |
| Number of ratings | **662** | — |
| Positive reviews | 80.8% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 months | Every 3 months |
| Monetization | Free with in-app purchases | — |
| Size | 185 MB | 12 MB |
| Requires iOS | **10.3** | 16.3 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 17+ |
| Developer | [Nguyen Thi Hoai Thu](https://appshunter.io/developer/1321248741) | [Buydeepdiscount.com LLC](https://appshunter.io/developer/817177888) |

## What reviewers say

### IELTS Collocation PRO

[App page](https://appshunter.io/ios/app/ielts-collocation-pro/id1422950549)

Enhance your English vocabulary for IELTS exams by learning essential word pairings. This app focuses on collocations, which are crucial for achieving higher scores in both writing and speaking sections.

**Highlights:** Learn essential IELTS collocations, Improve writing vocabulary, Boost speaking fluency, Offline access, Understand collocation patterns, Practice with example sentences

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium version | $8.99 | one-time |

**What reviewers like**

- 👍 Easy to use and user-friendly interface
- 📚 Comprehensive vocabulary learning resource
- 🎯 Excellent for IELTS exam preparation
- 💡 Well-organized and efficient structure
- 🆓 Generous free version available

**What reviewers complain about**

- 🐛 Radio feature not working
- 💰 Premium version lacks differentiation from free version
- 🌐 Requires internet connection to function
- ❌ Missing collocation data for many words
- 🔧 Premium purchase issues with latest updates

**Reported bugs**

- Radio feature not operational
- App non-functional without internet connection
- Premium version not recognized after update
- Ads continue to display for premium users
- Study Centre doesn't show correct answers for wrong responses

**Requested features**

- Alphabetical categorization of words
- Word count numbering system
- Collocation examples for search terms
- Offline functionality
- Ability to delete recent search history


### DataStructureAndAlgorithm

[App page](https://appshunter.io/ios/app/datastructureandalgorithm/id6503237307)

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

**In-app purchases:** none


## Frequently asked questions

### Is IELTS Collocation PRO free?

IELTS Collocation PRO costs $8.99, and also offers in-app purchases.

### Is DataStructureAndAlgorithm free?

DataStructureAndAlgorithm costs $7.99, with no in-app purchases.

### Do IELTS Collocation PRO or DataStructureAndAlgorithm have ads?

Neither IELTS Collocation PRO nor DataStructureAndAlgorithm shows ads.

### Which is updated more often, IELTS Collocation PRO or DataStructureAndAlgorithm?

IELTS Collocation PRO ships an update every 3 months, and DataStructureAndAlgorithm every 3 months. Most recently, IELTS Collocation PRO was updated on October 7, 2026 and DataStructureAndAlgorithm on October 10, 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.*