Comparison

mmumble vs PDF Expert

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

Head to head
About

mmumble

Features
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Voice notes for everywhere voice notes don't work. mmumble is a voice keyboard. Tap the mic, talk like a person, and cleaned-up text shows up wherever your cursor is: Messages, Hinge, Letterboxd, Instagram, Reddit, X/Twitter, your Notes app, the search bar, the WhatsApp reply field, anywhere. No more thumbing out a paragraph. No more re-recording a voice memo because you said "um" twice. Talk the way you talk, and mmumble handles the rest. Five styles. Pick how you want to sound: โ€ข Casual โ€” everyday texting, contractions and all โ€ข Polished โ€” clear, not corporate โ€ข Snappy โ€” short and direct โ€ข Unhinged โ€” chaotic, very online โ€ข Poetry โ€” free verse from your voice Curse if you want. There's a toggle for that. mmumble preserves or removes expletives. It's your call, not a content filter's. 99+ languages. English, Spanish, French, Mandarin, Arabic, Hindi, Tagalog, Tatar, Maltese โ€” mmumble understands them all. Works in (almost) every app. Set mmumble as a keyboard once in Settings, then swipe to it anywhere you'd normally type. Doesn't make you sound like a clanker. The whole point. No corporate AI cadence. No "I hope this email finds you well." No em-dashes everywhere. mmumble keeps your voice. Private by default. Audio leaves your phone only when you tap the mic, and never touches our servers in a state we can read after the request finishes. No training on your voice. Free to try. Made for people who think faster than they type. Say it, don't type it

About

PDF Expert

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Turn your iPhone into a portable document scanner. Whether it's paper documents, contracts, receipts, books, photos, or even ID cards and passports, you can quickly scan, crop, enhance, recognize, and export them. Through intelligent edge recognition and OCR text recognition technology, it quickly converts paper content into clear PDFs, images, or editable text, making document digitization simpler. From daily document organization to office document scanning, everything can be done with just your phone. ### Intelligent Document Scanning * Quickly scan contracts, receipts, notes, business cards, books, certificates, photos, etc. * Automatically recognizes document edges and intelligently performs cropping and perspective correction. * Supports continuous shooting and batch scanning; multiple pages can be merged into a single PDF. * Supports exporting scanned content to common formats such as PDF, Word, and JPEG. * High-definition scanning processing makes paper documents clearer and easier to read. ### Quick ID Card & Passport Scanning No need to manually photograph, crop, or organize documents. * Supports fast scanning of ID cards, passports, etc. * Intelligently recognizes document areas and performs cropping. * Quickly generates clear and well-organized electronic document files. * Suitable for document submission, information archiving, office work, and daily document organization. Making ID card and passport digitization more efficient. ### Intelligent Image Optimization After scanning, you can further optimize the document effect: * Automatically crop document edges, rotate and adjust the scanned area. * Adjust brightness, color, and document display effects. * Multiple image enhancement filters to make text clearer. * Optimize shadows, stains, creases, and complex paper backgrounds. * Adjust page size and orientation. Even in less than ideal shooting environments, you can quickly obtain clearer and neater electronic documents. ### OCR Text Recognition Built-in OCR optical character recognition capability, which can extract text from images and scanned documents. * Recognize text content in scanned documents * Quickly convert images to editable text * Edit and organize recognition results * Support text copying and export * Support generating searchable PDF documents * Support exporting recognized content to TXT and other formats No need to re-enter paper documents; simply take a photo to digitize them. ### PDF Editing and Processing Not only can you scan, but you can also further process PDF files: * Merge multi-page documents into a PDF * Adjust the page order in a PDF * Crop and rotate pages * Add or organize scanned pages * Add handwritten signatures to documents * Quickly generate PDF files suitable for sharing, printing, and archiving From scanning to PDF organization, all done in one go. ### File Management As you accumulate more scanned documents, you can quickly organize your materials using the file management function. * Create custom folders * Categorize and save different types of documents * Quickly find scanned files Centralize the management of PDFs, images, and scanned documents Contracts, invoices, certificates, study materials, and work documents can all be neatly stored. ### Privacy and Document Protection Important documents deserve enhanced security. * Set passwords for important documents * Protect private files and folders * Securely store contracts, certificates, bank card information, and other personal documents * Reduce the risk of accidental access to important data Quickly transform paper documents into clear, easily managed digital documents, making your phone a true portable scanner and mobile digital office. This application uses an End User License Agreement (EULA): https://ycnx5impysbs.feishu.cn/wiki/NH8ywzQQWiCYR1kltYtcwjvXn2d Privacy Policy: https://ycnx5impysbs.feishu.cn/wiki/Q2S0w9XQqiEGmYkMDXfcncopngd

Screenshots

mmumble4 screens
PDF Expert4 screens

Verdict

The call

The clearest difference is ads: PDF Expert at none against mmumble's shown. PDF Expert also leads on iOS requirement (16.6 vs 18.5). On price, update cadence, in-app purchases and device support there is nothing between them.

Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS

CostPrice ยท In-app purchases ยท Ads ยท Monetization

Both are free to download. mmumble sells 2 in-app purchases, starting at $12.99 per month and PDF Expert sells 2 in-app purchases, starting at $3.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

mmumble ships an update every 8 days, PDF Expert every 9 days. Both last shipped on October 25, 2026.

Scorecard2 real differences ยท 4 level
mmumble versus PDF Expert: the parameters behind the verdict, then further details
ParametermmumblePDF Expert
PriceFreeFree
Update frequencyEvery 8 days โ€” betterEvery 9 days
AdsYesNo โ€” better
In-app purchasesYesYes
DevicesiPhoneiPhone, iPad โ€” better
Requires iOS18.516.6 โ€” better
Further details โ€” not scored
Size24 MB47 MB
Age rating4+4+
DeveloperCovalet LTDๆณฝๅผบ ่’ฒ

In-app purchases

2 purchases

mmumble

Subscriptions2
  • unlimited Monthly$12.991 Month
  • unlimited Annual7 Days trial$69.991 Year
2 purchases

PDF Expert

Subscriptions2
  • PDF Expert Premium Monthly$3.991 Month
  • PDF Expert Premium Yearly$29.991 Year

Questions

Is mmumble free?
mmumble is free to download, with in-app purchases available.
Is PDF Expert free?
PDF Expert is free to download, with in-app purchases available.
Do mmumble or PDF Expert have ads?
mmumble shows ads; PDF Expert does not.
Which is updated more often, mmumble or PDF Expert?
mmumble ships an update every 8 days, and PDF Expert every 9 days. Most recently, mmumble was updated on October 25, 2026 and PDF Expert on October 25, 2026.

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