Comparison

AI Vocabulary Book (Multiling vs CheckBoostAudio

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

Head to head
About

AI Vocabulary Book (Multiling

Features
Read full description

Build vocabulary in 16 languages with AI Supports 16 languages: English, Chinese, Korean, French, German, Italian, Spanish, Portuguese, Indonesian, Russian, Danish, Finnish, Swedish, Norwegian, Hindi, Malay. [What you can do] - Enter a word in the language you are learning, and AI writes an example sentence in that language on the spot. - Audio playback in all 16 languages, so you can connect spelling with sound. - List view shows all your saved words at a glance. - Card view lets you repeat words while listening. Playback speed is adjustable. [For learners of a second foreign language] Looking up a translation alone does not show you how a word is actually used. This app builds an example sentence around the word you want to remember. - For previewing and reviewing a second foreign language at university - For collecting the phrases you need before a trip - For anyone studying several languages at the same time

About

CheckBoostAudio

Features
Read full description

Take your listening experience to the next level with this simple and intuitive audio player designed for language learners! With powerful features to help you manage tracks for repeated listening and focused practice, it’s your perfect companion for efficient learning. # Key Features - Track Check Feature Mark the parts you couldn’t catch with a simple check. Instantly identify which tracks need more attention for smoother and smarter review. - Waveform Display for Precise Control Visualize your audio with a sleek waveform display! Easily pinpoint the exact moment you want to rewind or fast-forward to—perfect for detailed practice. - Checked Tracks Page Easily access all your checked tracks on the Checked Tracks page! Revisit and focus on the parts you struggled with or the sections you want to master. Designed for language learners, musicians, and anyone who loves music, this player enhances your listening habits, whether for study, practice, or leisure. Download now and start building better listening habits today!

Screenshots

AI Vocabulary Book (Multiling4 screens
CheckBoostAudio2 screens

Verdict

The call

The clearest difference is in-app purchases: CheckBoostAudio at none against AI Vocabulary Book (Multiling's 1. CheckBoostAudio also leads on ads (none vs shown) and update cadence (every 3 days vs every 2 weeks). On price and device support 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. AI Vocabulary Book (Multiling sells 1 in-app purchase, starting at $0.99 per month. CheckBoostAudio asks for nothing beyond the download.

UpkeepUpdate frequency

AI Vocabulary Book (Multiling ships an update every 2 weeks, CheckBoostAudio every 3 days. The most recent releases landed on November 11, 2026 and November 8, 2026 respectively.

Scorecard4 real differences · 2 level
AI Vocabulary Book (Multiling versus CheckBoostAudio: the parameters behind the verdict, then further details
ParameterAI Vocabulary Book (MultilingCheckBoostAudio
PriceFreeFree
Update frequencyEvery 2 weeksEvery 3 days — better
AdsYesNo — better
In-app purchasesYesNo — better
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS16.013.0 — better
Further details — not scored
Size12 MB32 MB
Age rating4+4+
DeveloperKazuaki TakahashiMasatomo Fukuda

In-app purchases

1 purchases

AI Vocabulary Book (Multiling

Subscriptions1
  • AI Vocabulary Book PRO Edition7 Days trial$0.991 Month
None

CheckBoostAudio

No in-app purchases

Questions

Is AI Vocabulary Book (Multiling free?
AI Vocabulary Book (Multiling is free to download, with in-app purchases available.
Is CheckBoostAudio free?
CheckBoostAudio is free to download, with no in-app purchases.
Do AI Vocabulary Book (Multiling or CheckBoostAudio have ads?
AI Vocabulary Book (Multiling shows ads; CheckBoostAudio does not.
Which is updated more often, AI Vocabulary Book (Multiling or CheckBoostAudio?
AI Vocabulary Book (Multiling ships an update every 2 weeks, and CheckBoostAudio every 3 days. Most recently, AI Vocabulary Book (Multiling was updated on November 11, 2026 and CheckBoostAudio on November 8, 2026.

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