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Cullen IELTS 7+

by Cullen Education Ltd (Apps)

  • Education
  • Paid
  • Zombie
  • Small & simple · 93
View on the App Store
Rating
1.0
1 ratings · Australia storefront
Last update
Oct 30, 2020
Version 1.0.1
Size
16 MB
Category
Education
Tracked since
Oct 10, 2026

Estimated revenue

A model estimate with a likely range, not a reported figure.

No estimate. Apps outside the grossing charts, and some countries, have no reliable rank-to-revenue curve, so we show nothing rather than a guess.

How this estimate is made

Rank: we take the app's best Top Grossing rank on the latest chart day. Category ranks are converted into an equivalent overall rank, because a #10 in Finance earns far less than a #10 overall.

Curve: that equivalent rank is read off a rank-to-revenue curve anchored on public company revenue and market-data reports for the US iPhone App Store.

Country: the curve is scaled per country (Japan is roughly a third of the US, Türkiye under 1%). Where we have no scale, such as China, there is no estimate.

Range: the likely range widens with country, category and chart depth. It is a plausible span, not a statistical confidence interval.

Not included: ads, payments outside the App Store, and any difference between gross sales and what the developer keeps. Low confidence means indirect data; medium means several independent sources agree.

Full method

Screenshots

As shown on the App Store listing.

About this app

Text from the App Store listing.

This app will help you to: increase your vocabulary for the IELTS writing and speaking tests; learn useful synonyms that will help you answer questions in the reading and listening tests; improve your reading speed and your listening accuracy; and improve your chances of achieving IELTS Band 7 and above.

Many IELTS candidates try to learn vocabulary but can’t remember the words when they need to use them in the test. This app is designed to help you remember the words you learn, improve your active vocabulary (the vocabulary you use in speaking and writing), and increase your reading speed.

Start by picking one of 25 topics, all related to the IELTS test. The first time you complete a topic, you must do the exercises in order – you can’t skip ahead! This is because you build your active vocabulary through repetition - it’s like having an IELTS teacher in your pocket.

You will complete 10 different exercises to improve: speed reading, spelling, listening, and accurate use in a sentence.

Once you have completed and unlocked all of the exercises in a topic, you can review them in any order, at any time. Repeat the topics to try to improve your accuracy in use, spelling, and to increase your speed-reading time. If you find the words too difficult, look out for IELTS Vocab 6+ coming out soon.

This app was written and designed by Pauline Cullen, the author of

  • The Official Cambridge Guide to IELTS
  • Cambridge Vocabulary for IELTS
  • Cambridge Vocabulary for IELTS Advanced
  • Common Mistakes at IELTS Intermediate
  • Cambridge Grammar for IELTS (co-author)

The app was constructed and produced by the amazing people at PEEK Creative, Cambridge, UK. I brought them the individual parts and a picture in my head and they assembled it, gave it an engine and made it work better than I ever imagined.

Book reviews for The Official Cambridge Guide to IELTS:

‘All books from this author are excellent.’
‘Worked like a charm for me. My test was exactly what this book showed it would be.’
‘Very happy...Best book for preparation to sit IELTS and get a high band’
‘This book is very helpful for IELTS exam I passed very well after using it, having failed the exam previously.’
‘This is one of the best IELTS course books I've come across. …Highly recommended.’

What’s new

Release notes for the latest version, as written by the developer.

v1.0.1

This update includes performance improvements and small bug fixes.

Rank history

Daily position in the Uzbekistan charts. #1 is at the top.

Best rank
#4
Current rank
#5
Days charting
7 of 7

On the charts today

Small & simple score

How realistic it is for a small team to build something like this.

93/100

Small & simple

  • Developer size70% · 25

    Developer: 2 apps on the charts

  • Audience size100% · 20

    Ratings: 1

  • App size100% · 10

    Size: 16 MB

  • Price model100% · 15

    Price model: paid

  • Demand proof100% · 30

    Best rank #4, 12 countries

An indicator, not a fact. We can't see team size. Calculated Oct 24, 2026 · method i2

How the score works

Version history

  • 1.0.1LatestReleased Oct 30, 2020