Whether you want more options like knowb4usign or a completely different take on the same concept, our curated list of 9+ similar apps has you covered. Updated for 2026 with the latest ratings and comparisons.
KobCard is a comprehensive gift card information platform that offers real-time exchange rates, price calculations, and the latest news on gift cards. It serves as a one-stop destination for individuals looking to buy, sell, or stay informed about the world of gift cards.
Collaborate with both humans and AI agents in shared workspaces. Every interaction is logged for a transparent audit trail, ensuring a unified identity model for all participants. Agents can actively participate in channels, not just communicate.
Easily track work hours with a simple timer and log time to specific tasks or projects. Utilize GPS tracking and geofencing to automatically log time based on job site arrival and departure. Add context with notes and photos, and gain insights through reports and team location monitoring.
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.
What We Love
👍 Helpful for managing project documents
👍 Convenient for PDF modifications
👍 Superior PDF handling on Mac
👍 Satisfactory in both Mac and Windows environments
Room to Improve
👎 Pro features not available on iOS/iPadOS
👎 Yearly charges for basic features
👎 Expensive and useless
👎 Fails to deliver promised features
👎 Impossible to reorder PDF files
👎 No direct support contact for iOS
👎 Crashes repeatedly on iPhone
🐛 Does not save markups or documents
🐛 Difficulty creating new folders
👎 GARBAGE, editor works better on iPhone
👎 Cannot rotate pages
👎 iPad V14 worse than previous versions
👎 Cannot markup/draw on PDFs with editing disabled
👎 No phone or live chat support
👎 Does not save documents after editing
👎 Cannot rotate PDFs
👎 Help pages not applicable to iPad
👎 Trial subscription not worth it without editing
👎 Won't start without full purchase
👎 Features advertised are missing
👎 Not working in iOS 17 pre-release
👎 Cannot edit PDF files
👎 Wastage of money
👎 Major let down, don't waste money
👎 Cannot create table of contents
👎 Cannot create fillable forms
👎 No support for this app
👎 User guide requires internet connection
👎 Program freezes up
👎 Fails to save after deleting pages
👎 Cumbersome and not intuitive interface
👎 Lacks OCR capability on iPad
👎 Cannot delete text and add text
👎 Total waste of money
👎 Not able to edit any PDF documents
🐛 App crashes after update
🐛 Editing is lost prior to crash
👎 Not free, requires purchase
👎 Download is free but app is not
👎 Not worth it, signatures don't work
👎 No upgrades from old PDFPen version
👎 Nowhere near Mac app functionality
👎 Disappointing iPad version
👎 No support under new ownership
👎 Lacks user manual for iPad app
👎 OCR and conversion functions unclear
👎 Cannot edit PDF files like PC version
👎 Crashes during every session
👎 Annotations not saved
👎 No choice but to write review
👎 Not seamless between desktop and app
👎 Cannot add text boxes or selection boxes
👎 Only basic filler app functionality
👎 No way to contact support
👎 Not all functionality available
👎 Cannot rearrange or rotate pages
👎 Cannot add to library
👎 Functions are greyed out
👎 No product support for iOS app
👎 User guides hard to locate
👎 Not worth the money
👎 No Apple Pencil support
👎 No serial numbers for iOS support
👎 Stylus link gives 404 error
👎 Incredible boondoggle
👎 Terrible app, nearly worthless
👎 Cannot paste pop-up notes
🐛 Crashes every time to edit a PDF
🐛 Cannot handle deleting pages
👎 Waste of $10
👎 No Apple Pencil in stylus list
👎 Cannot fill PDF made from Nitro Pro desktop
👎 Big disappointment
👎 Advert is fake
👎 Pathetic, feature-minimal
👎 Feels like a weekend project
👎 Apple Pencil support shown off does not exist
👎 Integration with cloud storage offloaded to Files app
