Comparison

Prep vs PolyPi AI

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Prep

Prepare for English proficiency tests like IELTS and TOEIC with AI-powered practice. Get realistic exam simulations, personalized study plans, and detailed feedback to improve your skills and achieve your target scores.

Highlights
  • AI Virtual Practice Room for IELTS
  • Comprehensive skill training (Listening, Reading, Writing, Speaking)
  • Realistic exam simulations with scoring
  • Personalized study plans based on goals
  • Mock tests for IELTS and TOEIC
  • Error detection and correction
Features
Read full description

- The Prep AI Virtual Room Duo: For IELTS preparation, the virtual practice room with Prep AI helps students comprehensively train all four skills: IELTS Listening, IELTS Reading, IELTS Writing, IELTS Speaking. Students can also practice with exam-format questions, and receive thorough grading and evaluation according to each scoring criterion, just like a real examiner. With advanced AI technology, the system can detects errors during IELTS test and provides appropriate corrections. What's amazing is that the AI uses the same evaluation method as the IELTS test scoring system, giving students a realistic experience similar to taking the actual IELTS test. Exciting, isn't it? PREP also offers many useful features to support students learn English more effectively, such as: • Study Plan: The system helps students learn English more easily by analyzing the goals set by students, then arranging a suitable study path divided into separate lessons and english test, ensuring students achieve their desired goals. The system also accompanies students throughout the learning process to answer questions and update their English learning path. • My Course: A place to aggregate and store English learning and english test programs, helping students easily control their learning progress. Students can click on the desired program to join the corresponding English course • Test Practice: One of the most useful features of the software: Mock Tests. With a diverse library of tests divided into four skills, a large number of english test like IELTS, TOEIC,... tests help students quickly familiarize themselves and develop their test-taking skills. Additionally, the system provides prediction tests to help students get used to the structure of the most recent year's test, increasing the applicability of this feature. • Prep has been helping over 10,000+ students improve daily, assisting thousands in achieving their study goals for IELTS, TOEIC, and national high school exams. • Prep features proprietary modern AI technology capable of recreating the test environment in a virtual test room, providing students with the most realistic experience during test preparation. • Prep offers diverse and useful features suitable for various user goals, whether learning English, practicing for TOEIC, or prep for IELTS Contact us immediately when you need support: Email: support@prepedu.com

About

PolyPi AI

Prepare for TOEIC and IELTS exams with an AI-powered English learning assistant. Practice speaking and writing, receive grammar corrections, and get personalized lesson recommendations based on your performance. Optimize your learning journey with accurate scoring and in-depth analysis.

Highlights
  • AI-powered exam preparation
  • Speaking and writing practice
  • Grammar correction and suggestions
  • Automatic translation
  • Scored practice sessions
  • Personalized lesson recommendations
  • Unlimited essay grading
Features
Read full description

PolyPi AI stands as a unique English learning platform, focusing on TOEIC and IELTS exam preparation through Artificial Intelligence (AI). This platform is not merely an effective exam preparation tool but also serves as a personal assistant in your English learning journey. For IELTS, users can select and concentrate on desired topics, practicing speaking and writing in English with PolyPi AI. It not only checks grammar but also suggests accurate expressions, helping users to rectify and enhance their skills. Additionally, PolyPi AI has the capability to automatically translate, allowing users to easily understand and grasp the meanings of each sentence and word. The platform also scores practice sessions, helping users to gain clearer insights into their strengths and weaknesses, thus providing a correct learning direction. Based on learning results and scores, PolyPi AI will recommend suitable lessons and materials, assisting each user in optimizing their learning process. This platform delivers a personalized, flexible, and effective English learning experience. UNIQUE ADVANTAGES 1. Accurate Scoring : Our AI rapidly and precisely grades essays following IELTS band scores and provide upgraded versions of your essays. UNLIMITED essays can be graded/corrected. 2. In-Depth Analysis : AI analyzes errors and adjusts tests to focus on specific topics where each student often makes mistakes and needs to improve. 3. Freestyle & Themed Speaking : Unlimited speaking practice 24/7 with intelligent, flexible, and the most native-like AI. 4. 2 Speaking Practice Modes : Freestyle or practice with predicted IELTS Speaking topics (Most of which are actual IELTS tests. PolyPi AI is not just an app; it’s a revolutionary step in English learning, opening opportunities for everyone to conquer TOEIC and IELTS easily and effectively. Explore and experience PolyPi AI to open the doors to your future career and education! Download PolyPi AI today to commence your English learning journey and conquer crucial exams! Terms of Use: https://polypi.ai/terms Privacy Policy: https://polypi.ai/privacy

Screenshots

Prep4 screens
PolyPi AI4 screens

Verdict

The call

The clearest difference is ads: PolyPi AI at none against Prep's shown. PolyPi AI also leads on iOS requirement (12.0 vs 15.0). Prep's advantage is review sentiment (86% vs 60%). On price, update cadence, in-app purchases and monetization model 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Prep sells 73 one-off in-app purchases and PolyPi AI sells 3 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Prep ships an update every 5 days, PolyPi AI every 3 days. The most recent releases landed on October 12, 2026 and October 2, 2026 respectively.

Scorecard3 real differences · 7 level
Prep versus PolyPi AI: the parameters behind the verdict, then further details
ParameterPrepPolyPi AI
PriceFreeFree
Rating4.6 (121 ratings) — better—
Positive reviews85.7% of reviews — better60.0% of reviews
Number of ratings121 — better—
Update frequencyEvery 5 daysEvery 3 days — better
AdsYesNo — better
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.012.0 — better
Further details — not scored
Size136 MB159 MB
Age rating4+4+
DeveloperPREP TECHNOLOGY JOINT STOCK COMPANYNGO XUAN DAI

Customer experience

Prep

All ratings121 ratings
Positive90.9%
Neutral4.1%
Negative5.0%
Written reviews28 reviews
Positive85.7%
Neutral0.0%
Negative14.3%

PolyPi AI

Written reviews5 reviews
Positive60.0%
Neutral20.0%
Negative20.0%

In-app purchases

73 purchases

Prep

One-time73
  • IELTS Pro 1 tháng$9.99
  • IELTS Pro 3 tháng$19.99
  • IELTS Core 월간 이용권$22.99
Show 70 more
  • IELTS Core – Monthly$25.00
  • Gói luyện đề THPTQG 30 ngày$29.99
  • IELTS Pro 6 tháng$29.99
  • PrepTalk English Advanced$34.99
  • IELTS Premium – Monthly$39.00
  • IELTS Premium 월간 이용권$39.99
  • IELTS Premium 月額プラン$39.99
  • AI Tutor 專業口說訓練 3個月-HK$39.99
  • AI Tutor 전문 스피킹 트레이닝 3개월$39.99
  • AI Tutor プロ向けスピーキング訓練 3ヶ月$39.99
  • PrepTalk English Advanced (PRO)$49.99
  • PrepTalk English Intermediate (PRO)$49.99
  • PrepTalk English Basic (PRO)$49.99
  • IELTS Core 3개월 이용권$59.99
  • Gói luyện đề TOEIC 90 ngày$59.99
  • IELTS Core – Quarterly$63.00
  • Từ vựng - Ngữ pháp - Phát âm$69.99
  • AI Tutor 전문 스피킹 트레이닝 6개월$69.99
  • PrepTalk English Inter - Advanced$69.99
  • PrepTalk English Basic - Inter$69.99
  • Gói luyện đề TOEIC 30 ngày$79.99
  • IELTS Premium 3개월 이용권$79.99
  • AI Tutor 專業口說訓練 6個月-HK$79.99
  • IELTS พื้นฐานอ่อนจนถึง 4.0$79.99
  • Mất gốc đến HSK 1$79.99
  • IELTS Premium – Quarterly$89.00
  • Gói luyện đề THPTQG 90 ngày$89.99
  • IELTS Premium 3か月プラン$89.99
  • AI Tutor プロ向けスピーキング訓練 6ヶ月$89.99
  • Gói luyện đề IELTS 30 ngày$99.99
  • PrepTalk English Basic to Advanced$99.99
  • PTE Inter - Advanced (PRO)$99.99
  • PTE Basic to Intermediate (PRO)$99.99
  • แพ็กเกจฝึกทำข้อสอบ IELTS 90วัน$99.99
  • Gói luyện đề TOEIC 180 ngày$99.99
  • AI Tutor 專業口說訓練 12個月-TW$119.99
  • IELTS Core 연간 이용권$129.99
  • PTE Basic - Advanced (PRO)$129.99
  • TOEIC Mock Tests 3개월$129.99
  • IELTS จาก 4.0 จนถึง 5.0$129.99
  • IELTS พื้นฐานอ่อนจนถึง 4.0 (PRO)$129.99
  • IELTS Core – Annual$139.00
  • 90-Day IELTS TP Package$139.99
  • AI Tutor 전문 스피킹 트레이닝 12개월$149.99
  • AI Tutor 專業口說訓練 12個月-HK$149.99
  • PTE2 mất gốc - chuyên sâu Pro$149.99
  • Gói luyện đề THPTQG 180 ngày$179.99
  • AI Tutor プロ向けスピーキング訓練 12ヶ月$179.99
  • Mất gốc đến LR 800+ và SW 300+$179.99
  • IELTS จาก 5.0 จนถึง 6.0$199.99
  • IELTS จาก 4.0 จนถึง 5.0 (PRO)$199.99
  • HSK từ 0 đến 4$199.99
  • แพ็กเกจฝึกทำข้อสอบIELTS 180วัน$199.99
  • Gói luyện đề TOEIC 365 ngày$229.99
  • IELTS Premium 연간 이용권$249.99
  • TOEIC Mock Tests 6개월$249.99
  • IELTS จาก 6.0 จนถึง 7.0+$249.99
  • IELTS จาก 5.0 จนถึง 6.0 (PRO)$249.99
  • TOEIC - SW mất gốc đến 300+$249.99
  • IELTS Premium – Annual$279.00
  • 180-Day IELTS TP Package$279.99
  • Gói luyện đề IELTS 90 ngày$299.99
  • IELTS Premium 年間プラン$299.99
  • IELTS จาก 6.0 จนถึง 7.0+ (PRO)$299.99
  • Gói luyện đề IELTS 365 ngày$299.99
  • Gói luyện đề IELTS 180 ngày$349.99
  • แพ็กเกจฝึกทำข้อสอบIELTS 365วัน$449.99
  • 360-Day IELTS TPe Package$559.99
  • IELTS พื้นฐานอ่อนจนถึง 7.0+$599.99
  • IELTS from 4.0 to 6.5+$749.99
3 purchases

PolyPi AI

One-time3
  • Gói Point$29.99
  • Gói 3 tháng$29.99
  • Gói 6 tháng$49.99

Questions

Is Prep free?
Prep is free to download, with in-app purchases available.
Is PolyPi AI free?
PolyPi AI is free to download, with in-app purchases available.
Do Prep or PolyPi AI have ads?
Prep shows ads; PolyPi AI does not.
Which is updated more often, Prep or PolyPi AI?
Prep ships an update every 5 days, and PolyPi AI every 3 days. Most recently, Prep was updated on October 12, 2026 and PolyPi AI on October 2, 2026.

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