DET Prep by Arno

Developer: Mugen Inc.(NY)

Category: Education

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550 installs

11 ratings

18 monthly active users

$<10K monthly revenue est.

IAP 100% · Ad 0%

DET Prep by Arno Summary

DET Prep by Arno is a with in-app purchases iOS app in Education by Mugen Inc.(NY). Released in Sep 2023 (2 years ago). It has 11 ratings with a 4.45★ (good) average. Based on AppGoblin estimates, it reaches roughly 18 monthly active users and generates around $<10K monthly revenue (100% IAP / 0% ads). Store metadata: updated Jan 2, 2026.

Store info: Last updated on App Store on Jan 2, 2026 .

SDKs, Trackers & Permissions

App not yet scanned for SDKs.

App Details

Store ID: 6463340737

First Released: 2023-09-11

Store Last Updated: 2026-01-02

In-App Purchases: Yes

Ads: No

Website: goarno.io

App Store

Crawl Status: Success

AppGoblin First Crawled: 2025-03-10

AppGoblin Last Crawled: 2026-03-23

Ads & App-Ads.txt

App does not have ads.

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App not yet analyzed for SDKs.

The download and scan process is automated but can require manual troubleshooting. Feel free to reach out if your request does not complete in 24hrs or if you have any questions.

4.45★

Ratings: 11

5★

4★

3★

2★

1★

Screenshots

App Description

Free & unlimited practice exercises for every question type: Practice all 13 question types on the Duolingo English Test as much as you would like. Arno is the only practice tool you will need.

Accurate scoring and thorough feedback, instantly: Arno instantly scores your responses using the same guidelines that Duolingo uses in the actual exam. You'll also get thorough feedback on your grammar and vocabulary that will boost your scores immediately.

Always up to date: Duolingo is constantly updating the test. Arno has the newest question types so that you can be fully prepared.

Create your free account today and see why hundreds of students from over 35 countries use Arno to make their study abroad dreams come true.