Comparison

100 vs RubiMask

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

Head to head
About

100

Features
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It is said that if you spend 100 hours on anything, you will acquire a new skill or habit. This app allows you to measure the time you spend on your goals. When you spend the 100 hours that are said to be the standard for habituation, you will surely feel the new skill or habit. To support your goal achievement to the fullest, we will add new features from time to time. Please feel free to send us your opinions and requests.

About

RubiMask

Features
Read full description

【PDF & Photo to Text, Audio, Translation】OCR, translate, and read aloud — all in ONE app! Load scanned books, PDFs, or photos → OCR text extraction → translate → listen with text-to-speech or export audio files. Everything in one app. For vertical Japanese books, RubiMask auto-masks ruby (furigana) before OCR, so small phonetic characters never scramble your text — a unique feature for Japanese book digitization. PROBLEM SOLVED "OCR scrambles my Japanese text because furigana mixes with main characters..." "Scanned books have terrible text recognition accuracy..." "I want to listen to my books as audio..." "I need to translate a printed document I photographed..." KEY FEATURES 【Multilingual OCR】 - Specialized recognition for vertical Japanese text - Supports English, Chinese, Korean, French, German, Spanish, and many more - Choose the recognition language per document - Edit recognized text directly in-app - Real-time character change tracking - Automatically removes running headers and page numbers, recognizing body text only 【Auto Ruby Masking】(unique for vertical Japanese) - Automatically detects text columns in vertical Japanese - Calculates column spacing to mask only ruby areas - Robust on gray-paper scans and irregular layouts - Fully adjustable column width and pitch, tap-to-edit masks 【Enhanced Photo Import】 - Auto perspective correction for documents photographed at an angle - Rotate photos 90° left or right - Recognizes high-resolution photos (12MP+) at full quality 【Translation】 - Translate recognized text with one tap (iOS 17.4+) - Great for language learning and reading foreign documents 【Text to Speech】 - Listen to recognized text with natural voices - Export audio files (M4A) — turn books into audiobooks! - Adjustable speed and voice 【Multiple Export Formats】 - Text file (.txt) - Audio file (M4A) - PNG images (ZIP compression available) - Masked PDF output - Save directly to Photos - Export options: insert page breaks or join lines into sentences 【Convenience Features】 - App interface available in 35 languages - Sample PDFs in your language to try every feature - Margin masking (remove page numbers, headers) - Manual mask editing (drag & drop) - Undo/redo for mask editing - Project save/load for pause & resume - Pinch-to-zoom for precise adjustments PERFECT FOR - Digitizing paper books and rare editions - Extracting text from novels and documents - Preparing source text for translation - Creating furigana-free versions for Japanese learners - Converting books to audiobook format - Creating accessible text for screen readers - Reading printed foreign-language documents PREMIUM FEATURES - Remove all ads - Unlimited pages (free: 100 pages) - Unlimited project saves (free: 3 projects) - PDF export - Audio export (M4A) Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://keik.co.jp/rubimask/privacy-en.html

Screenshots

1003 screens
RubiMask4 screens

Verdict

The call

The clearest difference is in-app purchases: 100 at none against RubiMask's 3. 100 also leads on ads (none vs shown) and device support (4 vs 2). On price 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. RubiMask sells 3 in-app purchases, starting at $2.99 per month. 100 asks for nothing beyond the download.

Scorecard3 real differences · 3 level
100 versus RubiMask: the parameters behind the verdict, then further details
Parameter100RubiMask
PriceFreeFree
Update frequency—Every 4 weeks
AdsNo — betterYes
In-app purchasesNo — betterYes
DevicesiPhone, iPad, Apple Watch, Vision Pro — betteriPhone, iPad
Requires iOS17.017.0
Further details — not scored
Size1 MB26 MB
Age rating4+4+
DeveloperKohei KanaguKeiK LLC

In-app purchases

None

100

No in-app purchases

3 purchases

RubiMask

Subscriptions2
  • RubiMask Premium$2.991 Month
  • RubiMask Premium7 Days trial$11.991 Year
One-time1
  • RubiMask Premium$19.99

Questions

Is 100 free?
100 is free to download, with no in-app purchases.
Is RubiMask free?
RubiMask is free to download, with in-app purchases available.
Do 100 or RubiMask have ads?
RubiMask shows ads; 100 does not.

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