MergeKey vs ScanFlow
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
MergeKey
This keyboard dynamically adjusts key sizes and visibility as you type, offering larger tap targets and fewer errors. It supports 20 languages and includes customizable styles and privacy-focused features.
- Dynamic key resizing
- Hides impossible keys
- Supports 20 languages
- Customizable styles
- Privacy-focused
- Typing game
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MergeKey — the first keyboard that hides the keys you don't need. As you type, MergeKey dynamically removes impossible letters and expands the remaining keys, giving you bigger tap targets and fewer typos. It's like autocomplete, but visual — you see your options shrink in real time. MERGE MODE — UNIQUE TO MERGEKEY - Keys that can't continue your word disappear instantly - Remaining keys grow to fill the space — bigger keys, fewer mistakes - Learns new words you teach it - Toggle Merge Mode off if you prefer just the disappearing keys without resizing MADE FOR IPAD - Full-size layouts on large iPads, a roomier compact layout on smaller ones - Pinch to split the keyboard for thumb typing, with adjustable split distance - Two-finger trackpad: drag across the keys to move the cursor - Letters Only mode for a clean, focused board - Split typing on iPhone too, in landscape 31 LANGUAGES English, German, French, Spanish, Italian, Portuguese, Dutch, Polish, Czech, Slovenian, Greek, Turkish, Bulgarian, Russian, Ukrainian, Indonesian, Vietnamese, Swedish, Finnish, Danish, Norwegian, Icelandic, Lithuanian, Romanian, Hungarian, Irish, Hebrew, Arabic, Urdu (Latin), Bangla and Hindi — each with native prediction and accented character variants. English (US/GB), Spanish (ES/MX) and Portuguese (BR/PT) with correct regional dictionaries. Hindi, Bangla and Urdu in Latin letters. SMART FEATURES - Quick Settings right in the keyboard — tap the MergeKey icon - Scrolling prediction bar with up to 9 word suggestions - Long-press for accented letters and symbols - Character preview bubble on key tap - Optional dedicated number row - Double-tap shift for caps lock - Backspace hold-to-accelerate (characters, then words) - Hold 123 for a fan of digits; hold the comma key for more signs CUSTOMIZABLE STYLE - 14 keyboard styles: Default, Liquid Glass (iOS 26), Classic, Ink on Paper, Typewriter, Keycaps, Sharp, Brick, Pixel, Glossy, Metal, Backlit, Calculator, Neon - Custom key fill, border, character and accent colors - Letters that grow with their keys as they merge (optional) - 6 key fonts - Keyboard height: Compact, Normal or Tall - Transparency slider for key fill opacity - Animation speed control - Live keyboard preview in Settings and Style - Own colors for single function keys, a Black and White accent and Reset Style BUILT FOR LEARNERS - Swipe up to teach MergeKey a new word - Swipe down for continuous mode (all keys visible) - Swipe left to delete whole words - Swipe right to paste the last thing you copied - Key heatmap per language shows which letters you type most and where your thumb lands - Built-in typing game to practice in any language - Live lessons in How to – every gesture plays on your own keyboard - 3 mini games: Tennis, Surfing, Penalty Kick PRIVACY FIRST MergeKey does not collect or transmit your typing data. Everything stays on your device. MergeKey never connects to the internet. The only network activity is the App Store handling the optional tips – that's why iOS shows a Mobile Data switch for MergeKey. The optional clipboard keeps your texts on this device only. Word lists based on the Leipzig Corpora Collection (CC BY 4.0). AI4Bharat Aksharantar (CC BY).
ScanFlow
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ScanFlow: PDF Scan & Edit is a powerful document scanner that uses advanced AI to capture, enhance, and convert your paper documents into high-quality PDFs, DOC, DOCX, TXT, JPG, and PNG files. With smart preview, you can instantly see and edit scanned content, while intuitive file management lets you organize documents into folders and merge multiple PDFs into one. The app offers lossless compression to reduce file size without sacrificing quality and includes AI-powered enhancement to automatically improve scan clarity, brightness, and contrast. The free version allows you to edit up to 3 files, scan and export 3 documents, merge 3 files, and apply basic compression. Upgrade to Premium for unlimited scanning and PDF creation, unlimited export, full access to all editing tools, unlimited merging, advanced compression, and complete conversion capabilities. Whether you need to digitize receipts, contracts, notes, or photos, ScanFlow provides a professional suite of tools right in your pocket. Its AI enhancement ensures even low-light or blurry scans become crisp and readable. Simple to use yet packed with features, ScanFlow is ideal for students, professionals, and anyone who works with documents daily. This application contains auto-renewable subscriptions and In-App Purchases: Weekly - $4.99, Monthly - $12.99, Yearly - $39.99, One‑Time Purchase-$59.99 Terms of Use Link: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy Link: https://docs.google.com/document/d/1yc8K4li_lApaQeF816mQNW0G_kYNNByZuae1DFqw9Ak/edit
Screenshots
Verdict
The clearest difference is in-app purchases: MergeKey at none against ScanFlow's 5. ScanFlow's advantage is iOS requirement (13.0 vs 18.0). On price, ads 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. ScanFlow sells 5 in-app purchases, starting at $4.99 per 7 days. MergeKey asks for nothing beyond the download.
| Parameter | MergeKey | ScanFlow |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (3 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 3 — better | — |
| Update frequency | Every 4 days | — |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free | — |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 18.0 | 13.0 — better |
| Further details — not scored | ||
| Size | 39 MB | 59 MB |
| Age rating | 4+ | 4+ |
| Developer | Andrei Achziger | Jordan Farrell |
In-app purchases
MergeKey
No in-app purchases
ScanFlow
- Weekly$4.997 Days
- Weekly-Trial3 Days trial$4.997 Days
- Monthly$12.991 Month
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- Yearly$39.991 Year
- Lifetime$59.99









