Comparison

Fast Prep for IELTS vs Lingo Diary

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

Head to head
About

Fast Prep for IELTS

Features
Read full description

Prepare for IELTS with focused practice for vocabulary, Writing, and Speaking. Fast Prep for IELTS helps you practise at your own pace with: β€’ Key vocabulary practice organised by band level β€’ IELTS test overviews for Listening, Reading, Writing, and Speaking β€’ Writing Task 1 and Task 2 questions β€’ AI-powered writing feedback β€’ Speaking Part 1, Part 2, and Part 3 practice β€’ AI-powered speaking feedback, including fluency, vocabulary, grammar, and pronunciation guidance β€’ English and Traditional Chinese support β€’ Saved practice history so you can review your progress Some AI feedback features use credits. Credits may be included with a subscription or purchased separately. Features and availability may vary by plan. IELTS is a registered trademark of its respective owners. Fast Prep is an independent study tool and is not affiliated with, approved by, or endorsed by IELTS or its owners. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

Lingo Diary

Features
Read full description

You know more than you think. If AI understands you, so will a native speaker. Stop dreading conversations. Start actually enjoying them! Lingo Diary is perfect for you β€” β€’ Mind goes blank the moment you try to speak? Type or use voice messages. It feels like texting a friend, not studying. β€’ Worried your grammar or vocabulary isn't good enough? Just say it in English. No judgment. AI gives feedback so the right phrases stick over time. β€’ Only have small pockets of time to practice? Open the app and talk about anything. Work stress, weekend plans, whatever's on your mind. --- 【 Learn Chinese, Japanese, or Korean β€” Anytime, No Pressure 】 Use the vocabulary you have. Type or speak at your own pace. The more you chat, the more you'll want to. 【 Sound and Listen Like a Native 】 Get pronunciation demos for your voice messages. AI voice replies sound genuinely human. Use Listening Mode to hear before you read and train your ear to catch real, natural speech. 【 Stuck? Just Say It in English 】 Can't find the word? Type in English and keep going. No frustration, no stopping. 【 Real-Time Feedback to Say It Better 】 You write a line, AI polishes it. Pick up natural phrasing through real conversations, no extra studying needed. 【 Your Personal Lingo Diary, Generated Automatically 】 Every chat becomes a diary entry. Review anytime and see how far you've come. Lingo Diary is built by a small team in Taiwan on a mission to make language learning feel a little less like work. Questions or feedback? Find us on Instagram @lingodiary.app_tw - Terms of Use: https://lingodiary.app/zh-tw/terms Privacy Policy: https://lingodiary.app/zh-tw/privacy

Screenshots

Fast Prep for IELTS4 screens
Lingo Diary4 screens

Verdict

The call

The clearest difference is device support: Fast Prep for IELTS at 3 against Lingo Diary's 1. Fast Prep for IELTS also leads on iOS requirement (15.0 vs 18.0). On price, update cadence, ads and in-app purchases 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. Fast Prep for IELTS sells 10 in-app purchases, starting at $9.99 per month and Lingo Diary sells 3 in-app purchases, starting at $9.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Fast Prep for IELTS ships an update every 4 days, Lingo Diary every 3 days. The most recent releases landed on November 8, 2026 and October 25, 2026 respectively.

Scorecard2 real differences Β· 4 level
Fast Prep for IELTS versus Lingo Diary: the parameters behind the verdict, then further details
ParameterFast Prep for IELTSLingo Diary
PriceFreeFree
Update frequencyEvery 4 daysEvery 3 days β€” better
AdsYesYes
In-app purchasesYesYes
DevicesiPhone, iPad, iPod β€” betteriPhone
Requires iOS15.0 β€” better18.0
Further details β€” not scored
Size101 MB46 MB
Age rating4+4+
DeveloperJIH MING CHENSPARKLECT CO.,LTD.

In-app purchases

10 purchases

Fast Prep for IELTS

Subscriptions6
  • Essential Prep$9.991 Month
  • Score Booster$14.991 Month
  • Intensive Prep$24.991 Month
Show 3 more
  • Essential Prep$69.991 Year
  • Score Booster$119.991 Year
  • Intensive Prep$199.991 Year
One-time4
  • 5 Credits$2.99
  • 10 Credits$4.99
  • 20 Credits$9.99
Show 1 more
  • IELTS Guide$19.99
3 purchases

Lingo Diary

Subscriptions3
  • Plus$9.991 Month
  • Pro3 Days trial$12.991 Month
  • Max7 Days trial$19.991 Month

Questions

Is Fast Prep for IELTS free?
Fast Prep for IELTS is free to download, with in-app purchases available.
Is Lingo Diary free?
Lingo Diary is free to download, with in-app purchases available.
Do Fast Prep for IELTS or Lingo Diary have ads?
Both Fast Prep for IELTS and Lingo Diary show ads.
Which is updated more often, Fast Prep for IELTS or Lingo Diary?
Fast Prep for IELTS ships an update every 4 days, and Lingo Diary every 3 days. Most recently, Fast Prep for IELTS was updated on November 8, 2026 and Lingo Diary on October 25, 2026.

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