Comparison

iKnow! vs SortSnap

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

Head to head
About

iKnow!

Master Japanese, Chinese, and English with this app's adaptive learning engine. It offers multiple study modes and synchronizes your progress across devices for flexible learning. Ideal for anyone looking to efficiently acquire new vocabulary and sentence structures.

Highlights
  • Adaptive learning engine
  • Spaced rehearsal pattern
  • Five study modes
  • Vocabulary and sentence mastery
  • Progress synchronization
  • Audio playback with speed control
Features
Read full description

Enjoy the iKnow! experience on your phone or tablet! All your iKnow! study progress is automatically synched across devices, so you can study in the way that best matches your needs and lifestyle. “Japanese, Chinese, and English” Official courses are offered for studying Japanese, Chinese, and SAT English. The Japanese courses cover the 6,000 most commonly used words in Japanese. The Chinese courses cover the 2,000 most commonly used words in spoken Chinese and over 1,200 words commonly used in newspapers and magazines. (All Chinese courses are available in both Traditional and Simplified Chinese.) All words have sample sentences and audio. “The iKnow! Learning Engine” iKnow! presents items in a spaced rehearsal pattern optimized for efficient learning. iKnow! adapts to differences in learning speeds and item difficulty, constantly measuring memory and predicting performance across all of your items. iKnow! does this by tracking your performance and then predicting your optimal review time on an item-by-item basis. All you have to do is push the study button, and iKnow! tells you what to learn. ************** Features: - Five study modes: iKnow!, Rapid Choice, Self Check, Sentence Trainer, and Listening. - iKnow!: Master words and phrases with our patented learning algorithms. - Rapid Choice: Fast-paced quizzing and review. - Self Check: Judge yourself on what you know and how well. - Sentence Trainer: Master sentence patterns by listening and then dictating. - Listening: Listen to content on the go. You can slow down and loop any audio. - Study progress synched across supported devices.

About

SortSnap

Features
Read full description

【大学の講義資料や板書、写真の中に埋もれていませんか?】 SortSnapは、学生・社会人のための次世代型資料整理アプリです。撮った写真を即座に科目やプロジェクトへ分類し、あなたのデジタルノートを賢く進化させます。 ■ 主な特徴 ・科目別フォルダ管理:時間割やスケジュールに合わせて、写真を美しく整理。 ・マルチメディア一括管理:写真だけでなく、動画やPDF、音声ファイルも同じ科目内でまとめて管理できます。 ■ こんな方におすすめ ・講義の板書を撮るが、後から見返すと何の科目か分からなくなる ・試験前に効率よく復習や資料の整理をしたい ・配布された大量のプリントをデジタル化して持ち歩きたい 利用規約 (Terms of Use): 本アプリの利用には、Apple標準の利用規約(EULA)が適用されます。 https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

iKnow!4 screens
SortSnap4 screens

Verdict

The call

The clearest difference is in-app purchases: SortSnap at none against iKnow!'s 10. iKnow!'s advantage is ads (none vs shown) and update cadence (every 5 weeks vs every 4 months). On price, device support and iOS requirement 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. iKnow! sells 10 one-off in-app purchases. SortSnap asks for nothing beyond the download.

UpkeepUpdate frequency

iKnow! ships an update every 5 weeks, SortSnap every 4 months. The most recent releases landed on November 1, 2026 and October 28, 2026 respectively.

Scorecard3 real differences · 7 level
iKnow! versus SortSnap: the parameters behind the verdict, then further details
ParameteriKnow!SortSnap
PriceFreeFree
Rating4.8 (491 ratings) — better—
Positive reviews78.6% of reviews—
Number of ratings491 — better—
Update frequencyEvery 5 weeks — betterEvery 4 months
AdsNo — betterYes
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPod, Mac — betteriPhone, iPad, iPod
Requires iOS14.0 — better15.1
Further details — not scored
Size19 MB43 MB
Age rating4+12+
DeveloperDMM.com LLCTAIYO MOTO

Bugs and requests

iKnow!

Reported bugs

4 issues
  • Crashes on startup
  • Blank screens during multiple-choice questions
  • Issues with typing answers and registering input
  • Audio not playing for some example sentences

Requested features

7 requests
  • Add more languages beyond Japanese and Chinese
  • Improve community course integration
  • Implement a dark mode
  • Add more example sentences per word
  • Provide an option to learn without kanji
Show 2 more
  • Implement a notification system for review reminders
  • Add grammar drills and kanji writing practice

SortSnap

Not enough reviews yet to summarise bugs or requests.

In-app purchases

10 purchases

iKnow!

One-time10
  • 3 Month Plan$23.99
  • 12 Month Plan$39.99
  • 12+1 Month Plan$39.99
Show 7 more
  • 6 Month Plan$47.99
  • 6+1 Month Plan$47.99
  • 12+3 Month Plan$54.99
  • 12 Month Plan$59.99
  • 12 Month Plan$64.99
  • 12+1 Month Plan$64.99
  • 12 Month Plan$69.99
None

SortSnap

No in-app purchases

Questions

Is iKnow! free?
iKnow! is free to download, with in-app purchases available.
Is SortSnap free?
SortSnap is free to download, with no in-app purchases.
Do iKnow! or SortSnap have ads?
SortSnap shows ads; iKnow! does not.
Which is updated more often, iKnow! or SortSnap?
iKnow! ships an update every 5 weeks, and SortSnap every 4 months. Most recently, iKnow! was updated on November 1, 2026 and SortSnap on October 28, 2026.

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