Chaipang Subtraction vs Audio Book Reader
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Chaipang Subtraction
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1. Features and composition ▶ Increase the speed and accuracy of calculations “Chaipang Subtraction” is a game-based calculation learning app designed to improve children’s ‘subtraction’ skills. ▶ Increase the immersion level of children. “Chaipang Subtraction” is set in kindergarten and is played in the form of card games with friends so that children can feel immersed. ▶ Motivation to improve calculation skills All 50 characters you play with have different calculation skills. Your ranking changes according to the result of the game with each character. 2. How to enjoy Chaipang Subtraction with Chaipang friends! ① Let’s play subtraction games with card games! ② If you answer the correct answer first, you can get a star-shaped block! ③ The more blocks you have, the higher your ranking will be. ④ If you have the highest score, you can wear a crown! 3. Contact us If you have any questions, please contact us at the address below. Tel. +82-2-508-0710 Email. support@wecref.com Developer : wecref.dev@gmail.com
Audio Book Reader
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ReadBeam turns any printed book into a read-aloud lesson. Snap a page with your iPhone, and ReadBeam reads it back with each word lit up the moment its spoken built for early readers, struggling readers, and families with dyslexia. POINT YOUR CAMERA. HEAR THE BOOK. On-device OCR captures the page in seconds no typing required Edge detection straightens the page automatically Works on any printed book, worksheet, or note READ ALONG, NOT ALONE Each word highlights in real time as its spoken Builds the sound-to-symbol connection that powers fluent reading Adjustable pace for new readers and re-readers FRIENDLY VOICES Choose Sunny, Luna, or Atlas warm narrators Replay, pause, and rewind MADE FOR FAMILIES, BUILT FOR CLASSROOMS Parents can scan a bedtime book in under a minute Teachers prescan their class library and share with parents using a simple class code Every reader in the class gets the same library no duplicate work WHO USES READBEAM Parents of early readers (ages 5-8) Speech-language pathologists and reading specialists Teachers running guided-reading groups Homeschool families Families with dyslexia, ADHD, or print disabilities PRIVACY Text recognition runs on your device. The reader voices use Google Cloud Text-to-Speech to synthesize audio from recognized text. Books that teachers share to a class are stored on ReadBeam-hosted secure storage so students can read along. No third-party analytics, no ads, no data sold. Full policy: https://theaiconveyor.com/readbeam/privacy SUPPORT We answer every email. Reach us at https://theaiconveyor.com/readbeam/support TERMS OF USE ReadBeam Terms (includes Acceptable Use for scanned content): https://theaiconveyor.com/readbeam/terms ReadBeam is also licensed under the Apple Standard EULA: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is update cadence: Audio Book Reader at every 3 days against Chaipang Subtraction's every 3 months. Chaipang Subtraction's advantage is iOS requirement (13.0 vs 17.0). On price, ads, in-app purchases 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
Both are free to download. Chaipang Subtraction sells 1 one-off in-app purchase and Audio Book Reader sells 2 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.
Chaipang Subtraction ships an update every 3 months, Audio Book Reader every 3 days. The most recent releases landed on October 7, 2026 and October 23, 2026 respectively.
| Parameter | Chaipang Subtraction | Audio Book Reader |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 3 months | Every 3 days — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 13.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 136 MB | 17 MB |
| Age rating | 4+ | 4+ |
| Developer | Wecref Co., Ltd. | AI Conveyor Inc. |
In-app purchases
Chaipang Subtraction
- 차이팡 뺄셈 광고제거$2.99
Audio Book Reader
- Standard$2.991 Month
- Plus$4.991 Month
Questions
Is Chaipang Subtraction free?
Is Audio Book Reader free?
Do Chaipang Subtraction or Audio Book Reader have ads?
Which is updated more often, Chaipang Subtraction or Audio Book Reader?
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