EnginPrep vs PPI
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
EnginPrep
Prepare for the FE Civil and Mechanical exams with daily practice problems and comprehensive review lessons. Track your progress, identify weak spots, and take timed mock exams. Sync your learning across devices with a single account.
- Daily FE practice problems
- Worked solutions for all problems
- Topic-specific content review
- Timed mock exams
- Weak spot identification drills
- Progress tracking and syncing
- Cross-device compatibility
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Pass the FE exam with EnginPrep, the FE prep platform built by an engineer who’s been through it. Practice on your phone, review on your laptop, and keep every bit of progress with one account on enginprep.com and this app. Start free, no sign-up required: three new FE problems every day with complete worked solutions, for both Civil and Mechanical. FREE DAILY PROBLEM SET A fresh set of three exam-style problems each day, the same set on the website and in the app. Work them, check your answer, and read the full solution. FULL ACCESS INCLUDES Quick Practice Choose your topics and work through hundreds of problems written to the NCEES exam specification. Every problem has a step-by-step solution, and figures zoom so you can read every dimension. Content Review A lesson for every topic on the Civil and Mechanical FE specs, with practice problems you can regenerate for new numbers until the method sticks. Exam Mode Timed mock exams that mirror the real FE: topic weighting from the NCEES spec, a full-length 110-question exam or a shorter session, breaks, and no feedback until you finish. Then a score breakdown by topic so you know exactly where you stand. Weak Spot Drills The app tracks your accuracy by topic and builds a drill from your lowest-scoring areas. Spend your study time where it counts. Progress Tracking See accuracy by topic, sessions over time, and your daily streak — synced with the website so you can study anywhere. ONE ACCOUNT, EVERYWHERE Your EnginPrep subscription covers enginprep.com and this app. Start a session on your phone during a commute and finish the review on your laptop that night. Built for the FE Civil and FE Mechanical exams. Works on iPhone and iPad, light and dark mode. Questions? Email team@enginpeers.com.
PPI
This mobile companion app provides on-the-go access to Kaplan's PPI online courses and learning hub. It syncs with your desktop account, offering Qbank quizzes, video lectures, flashcards, and progress tracking for test preparation.
- Qbank quizzes
- Detailed question explanations
- Video library
- Flashcards
- Progress tracking
- Free trial access
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MOBILE COMPANION APP FOR PPI, A KAPLAN COMPANY ONLINE COURSES AND LEARNING HUB Take your test prep on the go! Use this app for your actively enrolled accounts in PPI, a Kaplan Company Live Online, OnDemand, or Learning Hub courses. The app automatically syncs with your PPI desktop account—giving you on-the-go access to the following key resources from your course: - The ability to build and take Qbank quizzes - Detailed explanations for each question - Video Library so that you can watch all your course videos on your phone - Flashcards to memorize key concepts - Tracking that syncs everything you do in the app with your overall progress and performance If you're NOT already a PPI student, you can sign up within the app for a limited free trial that gives you access to: - FE Civil Flashcards - FE Civil Diagnostic Exams - FE Civil Exam information -ALWAYS AT THE CUTTING EDGE We constantly update our content, images, and questions so you can stay ahead of the curve. -GET STRATEGIC Step-by-step strategies walk you through each question. Review in-depth explanations and master the material. -LEARN FROM YOUR MISTAKES Detailed review materials and performance analytics help you continutally improve as you study.
Screenshots
Verdict
The clearest difference is review sentiment: EnginPrep at 62% against PPI's 0%. EnginPrep also leads on ratings volume (192 vs 46). PPI's advantage is in-app purchases (none vs 1) and rating (4.7 vs 4.4). On price, update cadence, ads and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. EnginPrep sells 1 one-off in-app purchase. PPI asks for nothing beyond the download.
PPI holds the better App Store score, 4.7 against 4.4. Both are backed by a comparable volume of ratings — 192 and 46 respectively. Written reviews complicate that: 62% of EnginPrep's written reviews are positive against 0% of PPI's, so the app with the better star average is not the one people write more warmly about.
EnginPrep ships an update every 3 weeks, PPI monthly. Both last shipped on November 3, 2026.
| Parameter | EnginPrep | PPI |
|---|---|---|
| Price | Free | Free |
| Rating | 4.4 (192 ratings) | 4.7 (46 ratings) — better |
| Positive reviews | 61.5% of reviews — better | 0.0% of reviews |
| Number of ratings | 192 — better | 46 |
| Update frequency | Every 3 weeks — better | Monthly |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Freemium | Free — better |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 16.4 | 15.6 — better |
| Further details — not scored | ||
| Size | 45 MB | 66 MB |
| Age rating | 4+ | 4+ |
| Developer | EnginPeers LLC | Kaplan |
Customer experience
EnginPrep
PPI
In-app purchases
EnginPrep
- Premium Content$4.99
PPI
No in-app purchases






