Comparison

IELTS Practice & Mock Tests vs OnBook

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

Head to head
About

IELTS Practice & Mock Tests

Features
Read full description

Prepare for IELTS with realistic practice and instant, examiner-style feedback. IELTS Practice gives you full mock tests and task-by-task practice for all four sections, with AI scoring on the official IELTS band scale (0–9). SPEAKING - Parts 1, 2 and 3 with questions read aloud by the examiner - Band score from the four official criteria: Fluency & Coherence, Lexical Resource, Grammatical Range & Accuracy and Pronunciation - Every answer corrected, with a band 8–9 version of what you said - A sample answer for every question and cue card WRITING - Task 1 (reports) and Task 2 (essays) with a real exam timer - Band score, highlighted corrections and an improved version of your text READING & LISTENING - Exam-format passages and recordings with instant marking - See which answers were right and why MOCK TESTS - 10 full IELTS mock tests with an overall band and a band for each section - Review every task after the test PERSONAL STUDY PLAN - Set your target band and take a short 4-task test - See your estimated band for each section, the gap to your target and what to practise next TRACK YOUR PROGRESS - Practice history and analytics for every section - Compare your answers with other learners' answers PREMIUM SUBSCRIPTION Some tasks are free. Premium unlocks unlimited practice, all mock tests and full feedback. - Subscription options: 1 month and 6 months - Payment is charged to your Apple ID account at confirmation of purchase - The subscription renews automatically unless it is cancelled at least 24 hours before the end of the current period - Your account is charged for renewal within 24 hours before the end of the current period - You can manage or cancel your subscription in your App Store account settings Privacy Policy: https://testsucceed.com/privacy-policy Terms of use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

OnBook

Features
Read full description

Make every bedtime magical with OnBook. What if your child could step into their favorite story? OnBook uses advanced AI to create personalized fairy tales where your child is the main character. From brave explorers to magical forest friends, every story is a unique adventure designed just for them. Key Features: Be the Hero: Simply enter your child's name and interests to generate a one-of-a-kind storybook. Narrate with Your Voice: Record your own voice so your child can hear you read to them, even when you’re busy or away. Warm Crayon Art: Beautiful, hand-drawn style illustrations that spark imagination and comfort. Safe & Wholesome: AI-crafted content filtered for safety, ensuring a pure and positive experience for young minds. Your Personal Library: Save and collect every story to build a digital library of memories. Give your child the gift of wonder. Start your first story today with OnBook!

Screenshots

IELTS Practice & Mock Tests4 screens
OnBook4 screens

Verdict

The call

The clearest difference is update cadence: OnBook at every 5 days against IELTS Practice & Mock Tests's every 3 months. IELTS Practice & Mock Tests's advantage is iOS requirement (15.1 vs 26.0). On price, ads, in-app purchases and device support there is nothing between them.

Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS

CostPrice Β· In-app purchases Β· Ads Β· Monetization

Both are free to download. IELTS Practice & Mock Tests sells 3 in-app purchases, starting at $34.99 per month and OnBook sells 3 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

IELTS Practice & Mock Tests ships an update every 3 months, OnBook every 5 days. The most recent releases landed on November 9, 2026 and October 31, 2026 respectively.

Scorecard2 real differences Β· 4 level
IELTS Practice & Mock Tests versus OnBook: the parameters behind the verdict, then further details
ParameterIELTS Practice & Mock TestsOnBook
PriceFreeFree
Update frequencyEvery 3 monthsEvery 5 days β€” better
AdsNoNo
In-app purchasesYesYes
DevicesiPhone, iPad, iPod β€” betteriPhone, iPad
Requires iOS15.1 β€” better26.0
Further details β€” not scored
Size45 MB39 MB
Age rating4+4+
DeveloperTEST SUCCEEDJinyoung Jang

In-app purchases

3 purchases

IELTS Practice & Mock Tests

Subscriptions3
  • 1 Month Premium$34.991 Month
  • 6 Months Premium$59.996 Months
  • 1 Year Premium$99.991 Year
3 purchases

OnBook

One-time3
  • Ink 30 Pack$2.99
  • Ink 70 Pack$4.99
  • Ink 170 Pack$9.99

Questions

Is IELTS Practice & Mock Tests free?
IELTS Practice & Mock Tests is free to download, with in-app purchases available.
Is OnBook free?
OnBook is free to download, with in-app purchases available.
Do IELTS Practice & Mock Tests or OnBook have ads?
Neither IELTS Practice & Mock Tests nor OnBook shows ads.
Which is updated more often, IELTS Practice & Mock Tests or OnBook?
IELTS Practice & Mock Tests ships an update every 3 months, and OnBook every 5 days. Most recently, IELTS Practice & Mock Tests was updated on November 9, 2026 and OnBook on October 31, 2026.

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