Arno: DET, TOEFL, PTE, IELTS
by Mugen Inc.(NY)
- Education
- Free
- Small & simple · 90
- Rating
- 5.0
- 3 ratings · Russia storefront
- Last update
- Oct 18, 2026
- Version 1.3.23
- Size
- 84 MB
- Category
- Education
- Tracked since
- Oct 9, 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 methodScreenshots
As shown on the App Store listing.
About this app
Text from the App Store listing.
Arno is the fastest way to prepare for the Duolingo English Test (DET), TOEFL iBT, PTE Academic, and IELTS.
350,000+ students trust Arno. Together they have answered over 38,000,000 practice questions.
BUILT FOR THE 2026 EXAM FORMATS
Arno is fully updated for the latest 2026 DET, TOEFL, PTE, and IELTS question types, scoring rubrics, and timing. Practice exactly what you will see on test day.
FREE & UNLIMITED PRACTICE
Practice every DET, TOEFL, PTE, and IELTS question type as much as you want. Practice questions are always free and unlimited. Your first mock test is also free.
ACCURATE SCORING AND INSTANT FEEDBACK
Arno scores your responses using the same guidelines as the real exams. Get instant feedback on your grammar, vocabulary, pronunciation, and fluency to improve your scores fast.
REALISTIC FULL-LENGTH MOCK TESTS
Take complete, timed mock tests that match the real exam. Get an estimated score the moment you finish and detailed feedback on every answer. Every new user gets one free mock test.
GUIDED COURSES
Work through structured courses built around each exam. Short lectures paired with targeted practice, organized into clear units so you always know what to study next. Track your progress and pick up where you left off.
AI TUTOR THAT KNOWS YOUR WEAK SPOTS
Arno builds a personalized study plan around your target score. We track your progress across reading, writing, listening, and speaking, then give you the practice you need next.
VOCABULARY BUILDER
Master high-frequency words and phrases with spaced-repetition flashcards built for English proficiency exams.
ALWAYS UP TO DATE
Test makers update their exams often. Arno ships the newest question types and rubric changes so you are never caught off guard.
TRUSTED WORLDWIDE
Arno's interface is fully translated into 30+ languages. Students from over 200 countries use Arno every day to make their study-abroad dreams come true.
WHAT IS FREE AND WHAT IS PAID
Practice questions are always free and unlimited. Your first mock test is free. To unlock more mock tests, AI scoring on every answer, personalized study plans, and the 24/7 AI tutor, upgrade to one of our paid plans.
Download Arno and start your free practice today.
What’s new
Release notes for the latest version, as written by the developer.
Fixed a lot of bugs and added quality of life improvements.
Rank history
Daily position in the Libya charts. #1 is at the top.
- Best rank
- #2
- Current rank
- #9
- 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.
90/100
Small & simple
- Developer size100% · 25
Developer: 1 app on the charts
- Audience size100% · 20
Ratings: 3
- App size60% · 10
Size: 84 MB
- Price model80% · 15
Price model: free with in-app purchases
- Demand proof90% · 30
Best rank #2, 6 countries
An indicator, not a fact. We can't see team size. Calculated Oct 25, 2026 · method i2
How the score worksVersion history
- 1.3.23LatestReleased Oct 18, 2026
- 1.3.19Released May 8, 2026