Comparison

iStackz vs Thai Alphabet

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

Head to head
About

iStackz

Features
Read full description

Flashcard organizer, classifying cards in 5 levels from unknown to known. The color of the cards represents a characteristic of the card, typically the duration since the last positive test: the card turns darker over time, indicating the need to refresh it from time to time. This is very useful when e.g. learning Japanese kanji where a large set of characters must be kept in memory. Other color modes provide more detailed means to highlight cards prominently that must be refreshed, or represent the numbers of successes or failures. The app provides tools for testing and learning. Testing is used to assess the proficiency state of the cards, by moving it to the right side (known) or left side (unknown) with the arrow buttons, or by directly dragging the card on the screen. Learning is used to iterate through a short, growing list of cards until the new words are mastered sufficiently for the moment. The next testing session will show if the words stick. Every card has up to four attributes, which can be aligned in specific sequences in the testing and learning tools, to individually train specific skills. In addition to the displayed text, the attributes can be presented in a read aloud form with the text-to-speech function of iOS, with fully customized voices in all supported languages. A growing archive of wordlists is available on the homepage (stackz.com), or new wordlists can be created with the free Stackz List Editor on Windows. Card decks can be downloaded to the Apple Watch, where the card texts can be displayed continuously in the watch face complications for ongoing repetition - tapping on the text in the watch face opens the Stackz watch app to display all attributes of the card.

About

Thai Alphabet

Features
Read full description

Start reading Thai in minutes — not months. Thai Alphabet makes learning Thai script simple and fun. Whether you're a complete beginner, traveler heading to Bangkok, expat moving to Chiang Mai, or heritage learner reconnecting with the language, our structured lessons and spaced repetition system help you master every character with confidence. KEY FEATURES • Structured Lessons — Learn 44 consonants, 32 vowels, and 5 tone marks step by step with clear native pronunciation • Spaced Repetition (SRS) — Our scientifically-proven review system schedules practice at the perfect time so characters stick in long-term memory • Interactive Quizzes — Test your knowledge with engaging quiz sessions that adapt to your level • Placement Test — Already know some characters? Skip ahead to where you need to start • Daily Goals & Streaks — Build a consistent habit with daily learning targets and streak tracking • Medals & Achievements — Stay motivated as you unlock milestones on your learning journey • Audio Pronunciation — Hear every character spoken clearly by native Thai speakers • Progress Tracking — See exactly how many characters you've learned, mastered, and have due for review HOW IT WORKS 1. Start with the basics — learn vowels and consonants one at a time 2. Listen to audio pronunciation and study each character 3. Review with quizzes to reinforce what you've learned 4. Our SRS system brings characters back for review at the optimal time 5. Track your progress from beginner to mastery PERFECT FOR • Complete beginners with zero Thai knowledge • Travelers preparing for a trip to Thailand • Expats and digital nomads in Bangkok, Chiang Mai, or Phuket • Heritage learners reconnecting with the Thai language • Students of Thai or Southeast Asian languages • Muay Thai enthusiasts, Thai cooking fans, and Buddhism scholars Download now and start your Thai script journey today!

Screenshots

iStackz4 screens
Thai Alphabet4 screens

Verdict

The call

The clearest difference is ads: iStackz at none against Thai Alphabet's shown. On price, in-app purchases, device support and iOS requirement there is nothing between them.

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

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

Both are free to download. iStackz sells 1 in-app purchase, starting at $1.99 per month and Thai Alphabet sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Scorecard1 real difference Ā· 5 level
iStackz versus Thai Alphabet: the parameters behind the verdict, then further details
ParameteriStackzThai Alphabet
PriceFreeFree
Update frequencyEvery 4 weeks—
AdsNo — betterYes
In-app purchasesYesYes
DevicesiPhone, Apple Watch — betteriPhone
Requires iOS17.617.0 — better
Further details — not scored
Size3 MB20 MB
Age rating4+4+
DeveloperChristoph LuediYingwen Wang

In-app purchases

1 purchases

iStackz

Subscriptions1
  • Full functionality - monthly$1.991 Month
1 purchases

Thai Alphabet

One-time1
  • Remove Ads$3.99

Questions

Is iStackz free?
iStackz is free to download, with in-app purchases available.
Is Thai Alphabet free?
Thai Alphabet is free to download, with in-app purchases available.
Do iStackz or Thai Alphabet have ads?
Thai Alphabet shows ads; iStackz does not.

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