Comparison

Nitro PDF Pro vs Coolists

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

Head to head
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

About

Coolists

Features
Read full description

COOLISTS — COLLABORATIVE LISTS MADE SIMPLE Stay organized, collaborate with the people around you, and never lose track of what matters. Coolists is the list app that brings your personal tasks and shared projects together in one clean, fast, and intuitive place. Whether you are managing a grocery run, planning a move, organizing a team project, or keeping a daily task list, Coolists adapts to your rhythm without getting in the way. BUILT FOR REAL LIFE Creating a list takes just seconds. Give it a name, choose an icon, pick a color, and start adding items right away. Every item can hold a title and detailed notes, so you always have the context you need — no switching between apps, no lost information. The interface is clean and minimal by design, keeping distractions out and your focus where it belongs. Your data is always with you. Coolists is offline-first, meaning it works without an internet connection and syncs automatically the next time you open the app. Whether you are on the subway, in a basement, or somewhere with spotty signal, your lists are always accessible and up to date. SHARE AND COLLABORATE IN REAL TIME Lists are more powerful when they are shared. Invite a friend, a partner, or a colleague to any of your lists with a simple shareable link. Everyone in the list can add items, check tasks off, and see each other's changes appear in real time, no manual refreshing, no version conflicts. The activity log tracks membership history so you always know who joined and when. At a glance from the main screen you can see how many items each list contains and how many have already been completed. SECURE SIGN IN Coolists supports sign in with email-based authentication, keeping your account safe without requiring unnecessary personal information. Your lists travel with you automatically across all your devices from the moment you sign in. COOLISTS PREMIUM For users who need the full experience without any restrictions, Coolists Premium is a monthly subscription that unlocks every feature in the app. Unlimited Lists The free plan supports up to two lists. With Premium there is no cap, create as many lists as your life requires, from personal errands to complex multi-step projects. Unlimited Items The free plan allows up to three items per list. Premium removes this limit entirely, so no list is ever too long and no project too large to manage. Advanced Collaboration Free accounts can invite one collaborator per list. Premium lifts that restriction, letting you build shared lists with teams of any size. Everyone contributes, everyone stays in sync. Deadlines and Reminders Set a due date on any item and choose exactly when you want to be notified, at the moment of the event, fifteen minutes before, one hour before, or even a full day in advance. Coolists sends a push notification at precisely the right time. You can also add any deadline directly to your calendar with a single tap, keeping everything in one place. Attachments Attach a photo, a video, or a file from your library or file system directly to any item. Whether it is a receipt, a reference image, or a supporting document, the attachment is stored securely and always available when you open that item. Ad-Free Experience Free users see occasional banner and interstitial ads that help keep the app free. Premium users enjoy a completely uninterrupted, ad-free interface from top to bottom. PRIVACY Coolists collects only what is strictly necessary to make the app function. Your lists, items, and account data are stored securely. The app does not sell your information or use it for third-party advertising. The full privacy policy is accessible directly from within the app. PRIVACY POLICY AND TERMS OF USE Below are links to our privacy policy and terms of use: Privacy Policy: https://handyapps.es/apps-privacy/privacy.php?app=Coolists Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Nitro PDF Pro4 screens
Coolists4 screens

Verdict

The call

The clearest difference is ads: Nitro PDF Pro at none against Coolists's shown. Nitro PDF Pro also leads on iOS requirement (18.0 vs 26.2). Coolists's advantage is update cadence (every 2 weeks vs every 2 months). On price, 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

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 and Coolists sells 1 in-app purchase, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Nitro PDF Pro ships an update every 2 months, Coolists every 2 weeks. The most recent releases landed on October 1, 2026 and September 18, 2026 respectively.

Scorecard3 real differences · 7 level
Nitro PDF Pro versus Coolists: the parameters behind the verdict, then further details
ParameterNitro PDF ProCoolists
PriceFreeFree
Rating3.9 (161 ratings) — better—
Positive reviews12.5% of reviews—
Number of ratings161 — better—
Update frequencyEvery 2 monthsEvery 2 weeks — better
AdsNo — betterYes
In-app purchasesYesYes
MonetizationFree with in-app purchases—
DevicesiPhone, iPadiPhone, iPad
Requires iOS18.0 — better26.2
Further details — not scored
Size59 MB8 MB
Age rating4+4+
DeveloperNitro Software, Inc.Alberto del Rio

Bugs and 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

Coolists

Not enough reviews yet to summarise bugs or requests.

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
1 purchases

Coolists

Subscriptions1
  • No limits + No Ads$2.991 Month

Questions

Is Nitro PDF Pro free?
Nitro PDF Pro is free to download, with in-app purchases available.
Is Coolists free?
Coolists is free to download, with in-app purchases available.
Do Nitro PDF Pro or Coolists have ads?
Coolists shows ads; Nitro PDF Pro does not.
Which is updated more often, Nitro PDF Pro or Coolists?
Nitro PDF Pro ships an update every 2 months, and Coolists every 2 weeks. Most recently, Nitro PDF Pro was updated on October 1, 2026 and Coolists on September 18, 2026.

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