# ACT Mastery 2017 Prep

> Education

Canonical page: [https://chrome-stats.com/d/id1023503333](https://chrome-stats.com/d/id1023503333)

## Overview

- **ID:** `id1023503333`
- **Platform:** Apple
- **Type:** Apple app
- **Status:** Available
- **Publisher:** gWhiz, LLC
- **Category:** Education
- **Rating:** 4.70 / 5 (130 ratings)
- **Version:** 3.24.2
- **Last updated:** 2017-02-25
- **First published:** 2015-08-12
- **Size:** 60 MB
- **Data as of:** 2026-09-19
- **Store listing:** [Apple App Store](https://apps.apple.com/us/app/act-mastery-2017-prep/id1023503333)
- **Website:** [http://www.builtbyhlt.com](http://www.builtbyhlt.com/)
- **Privacy policy:** [http://www.builtbyhlt.com](http://www.builtbyhlt.com/)

## Description

ACT Mastery 2017 Prep is an offline ACT study app built by insiders who know the exam, offering section-specific prep, time-saving techniques, and more than 1,000 test-ready questions. Review exam-cracking techniques and build robust study habits without internet access, anytime.

The app provides a free version with limited questions and basic progress metrics. Upgrade to Premium with a one-time in-app purchase for lifetime access to 200 English questions with 16 strategies, 200 Reading questions with 6 strategies, 400 Math questions with 22 strategies, 200 Science questions with 12 strategies, plus 100+ flashcards, proven strategies, immediate feedback, and in-depth statistics to track strengths and weaknesses.

## Rankings

- #122,222 — Overall

## Review summary

Users largely praise ACT Mastery 2017 Prep for being free, thorough, and well organized. The app provides helpful explanations for incorrect answers and why other choices are wrong, and it groups content by subject with clear subtopics while tracking accuracy and time spent. The practice format—one question at a time with pacing guidance—helps identify weaknesses and target study efficiently. Some reviewers would like a built-in timer and a few reports occasional loading issues, but overall sentiment is highly positive.

### Pros

- Free and comprehensive ACT prep content with high-quality explanations.
- Clear, thorough explanations for incorrect answers that explain why other options are wrong.
- Organized by main groups (math, science, reading, writing) with subtopics and progress metrics (accuracy and time spent).
- One-question-at-a-time format with timed practice that helps pacing and test simulation.
- Easy to use / user-friendly; helps identify weaknesses and target practice; generally free to use.

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Source: [Chrome-Stats](https://chrome-stats.com/d/id1023503333)