Comparison

Flinto vs Nitro PDF Pro

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

Head to head
About

Flinto

This companion app allows you to view high-fidelity prototypes created with Flinto for Mac. It supports custom animated transitions, gestures, and scrolling. Easily transfer your designs via email, Airdrop, or iCloud.

Highlights
  • View high-fidelity prototypes
  • Custom animated transitions
  • Direct manipulation gestures
  • Flexible scrolling options
  • Live preview from Mac
  • Easy file transfer
Features
Read full description

The App Design App This is the companion app to Flinto for Mac. Flinto allows you to create high-fidelity prototypes with custom animated transition, direct manipulation gestures and flexible scrolling options. Use this app to view prototypes you create using Flinto for Mac. You can also use this app to see a live view of your prototypes while you work on them in Flinto for Mac. To get your Flinto files into this app, just email them to yourself, send them with Airdrop, or save them into iCloud. When you view a prototype, tap with three fingers to access the menu and exit the prototype.

About

Nitro PDF Pro

Edit, read, sign, and secure PDF documents on your iOS device. This powerful yet lightweight app allows for on-the-go productivity with features like text editing, annotation, form filling, and cloud syncing.

Highlights
  • Edit PDF text
  • Annotate and highlight PDFs
  • Fill and save PDF forms
  • Sign and share PDF documents
  • Password protect PDFs
  • Sync with cloud storage
  • Merge and organize PDFs
Features
Read full description

Ready to do more with PDFs on iPad & iPhone? Edit, read, sign and sync PDFs in the cloud with the powerful, lightweight Nitro PDF Pro app designed for iPad & iPhone users. Packed with features to help you stay productive on the go, Nitro PDF Pro for iPad & iPhone lets you edit, sign, share and manage your documents wherever you are - all in a secure and user-friendly interface. Get started for free with a 14-day trial today. “Superior PDF handling, & economical” “Nitro PDF Pro has become an essential tool in my daily business operations! It makes everything from document preparation to communication much easier for me.” “If you are looking for a workhorse app to handle your PDFs made by responsive developers, look no further...” -> With Nitro PDF Pro you can: EDIT PDFs ON THE GO * Easily edit PDF text wherever you are, on any iOS device * Make notes and add comments to PDFs for quick, on-the-go reference * Add images or mark-up PDFs with drawings, with stylus support for iPad ANNOTATE & HIGHLIGHT PDFs * Add annotations to PDF text and documents * Highlight text to stay organized and keep track of important information FILL & SAVE PDF FORMS * Fill and save PDF forms for fast & easy productivity * Keep your PDF forms secure with password protection SIGN & SHARE PDF DOCUMENTS * Sign & share PDF documents in a snap * Save text, signatures and images in your Library for easy re-use * Keep documents synced with the cloud for on-the-go signatures PROTECT, SECURE & SYNC PDFs * Password protect PDFs to keep your data and confidential information secure * Set the level of document encryption as required * Sync with the cloud to back up PDFs on iCloud, Dropbox, Google Drive, or Microsoft OneNote MERGE, EXPORT & ORGANIZE PDFs * Merge multiple documents into one PDF in just a few clicks for easy organization * Import, export & organize PDFs in folders for fast access and easy on-the-go editing * Duplicate, add, delete or rearrange pages for simple, custom document creation ADDITIONAL AMAZING PDF EDITOR FEATURES * Duplicate, add, delete, rotate and rearrange pages * Enable easier PDF reading with dark mode, search and zoom * Email & Airdrop your documents, with PDF flattening for maximum compatibility * View two documents simultaneously with multiple windows (iPadOS) * Bluetooth pressure-sensitive stylus support - automatically works with Apple Pencil * Support for Adonit Jot Touch and Jot Script styluses Still exploring PDF editors for iOS? No pressure! Give Nitro PDF Pro iOS a try for free with a 14-day trial and see how you like its features and functions. We think you’ll love the value we pack into our easy-to-use PDF iOS app. Questions and issues regarding our PDF app? We're here to help! Connect with Nitro through our Community Forum: https://community.gonitro.com/ NITRO POLICY https://www.gonitro.com/legal/privacy-policy https://www.gonitro.com/legal/terms-of-service

Screenshots

Flinto2 screens
Nitro PDF Pro4 screens

Verdict

The call

The clearest difference is rating: Nitro PDF Pro at 3.9 against Flinto's 3.3. Nitro PDF Pro also leads on ratings volume (161 vs 18). Flinto's advantage is in-app purchases (none vs 2) and review sentiment (36% vs 13%). 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Nitro PDF Pro sells 2 in-app purchases, starting at $19.99 per year. Flinto asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Nitro PDF Pro holds the better App Store score, 3.9 against 3.3. That said, the two scores are not equally well evidenced: Nitro PDF Pro has 161 ratings behind it against 18, so its average is the more settled of the two. Written reviews complicate that: 36% of Flinto's written reviews are positive against 13% of Nitro PDF Pro's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

Flinto ships an update every 3 weeks, Nitro PDF Pro every 2 months. The most recent releases landed on September 30, 2026 and October 1, 2026 respectively.

Scorecard7 real differences · 3 level
Flinto versus Nitro PDF Pro: the parameters behind the verdict, then further details
ParameterFlintoNitro PDF Pro
PriceFreeFree
Rating3.3 (18 ratings)3.9 (161 ratings) — better
Positive reviews35.7% of reviews — better12.5% of reviews
Number of ratings18161 — better
Update frequencyEvery 3 weeks — betterEvery 2 months
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS13.0 — better18.0
Further details — not scored
Size20 MB59 MB
Age rating4+4+
DeveloperFlinto, LLC.Nitro Software, Inc.

Customer experience

Flinto

All ratings18 ratings
Positive55.6%
Neutral11.1%
Negative33.3%
Written reviews28 reviews
Positive35.7%
Neutral21.4%
Negative42.9%

Nitro PDF Pro

All ratings157 ratings
Positive70.1%
Neutral5.1%
Negative24.8%
Written reviews64 reviews
Positive12.5%
Neutral6.3%
Negative81.3%

Bugs and requests

Flinto

Not enough reviews yet to summarise bugs or requests.

Nitro PDF Pro

Reported bugs

19 issues
  • Cannot reorder PDF files
  • Crashes when opening PDFs from websites/email
  • Does not save markups or documents
  • Difficulty creating new folders
  • Cannot rotate pages
Show 14 more
  • Cannot markup/draw on PDFs with editing disabled
  • Does not save documents after editing
  • Cannot rotate PDFs
  • Program freezes up
  • Fails to save after deleting pages
  • App crashes after update
  • Editing is lost prior to crash
  • Crashes every time to edit a PDF
  • Cannot handle deleting pages
  • Crashes when opening fillable PDFs
  • Crashes when typing in fields
  • No Apple Pencil support
  • Stylus link gives 404 error
  • Bugs like suddenly not being able to draw

Requested features

10 requests
  • Keyboard support (Cmd + F for search)
  • Ability to cancel search with Esc
  • OCR and conversion to text documents on tablets
  • User manual for iPad app
  • Support for Apple Pencil
Show 5 more
  • Ability to create table of contents
  • Ability to create fillable forms
  • Ability to rearrange pages
  • Ability to add to library
  • More intuitive interface

In-app purchases

None

Flinto

No in-app purchases

2 purchases

Nitro PDF Pro

Subscriptions1
  • Annual Subscription14 Days trial$19.991 Year
One-time1
  • Nitro PDF Pro for iOS$9.99

Questions

Is Flinto free?
Flinto is free to download, with no in-app purchases.
Is Nitro PDF Pro free?
Nitro PDF Pro is free to download, with in-app purchases available.
Which has better reviews, Flinto or Nitro PDF Pro?
Nitro PDF Pro is rated higher. Flinto averages 3.3 out of 5 from 18 ratings, while Nitro PDF Pro averages 3.9 from 161 ratings.
Do Flinto or Nitro PDF Pro have ads?
Neither Flinto nor Nitro PDF Pro shows ads.
Which is updated more often, Flinto or Nitro PDF Pro?
Flinto ships an update every 3 weeks, and Nitro PDF Pro every 2 months. Most recently, Flinto was updated on September 30, 2026 and Nitro PDF Pro on October 1, 2026.

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