9+ similar apps compared and reviewed
Whether you want more options like PDF快速盖章 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.
Easily add stamps and handwritten electronic signatures to PDF documents. Process contracts and agreements efficiently without printing or scanning, keeping your data secure locally on your device.
Easily calculate permutations and combinations for mathematics and statistics. This tool simplifies complex calculations, helping users save time and improve accuracy in exams and studies.
Calculate the precise time difference between any two dates and times, down to the second. Easily determine future or past dates based on a specified duration. Ideal for tracking events, financial periods, or personal milestones.
Easily declutter your photo library with a fun swipe interface. Organize photos and videos by month, extract text from images with OCR, and manage large video files efficiently. Keep your device storage optimized.
Effortlessly create and apply professional seals and digital signatures to documents. This tool offers a variety of templates, fonts, and customization options, with features for extracting existing stamps and performing office tasks like PDF conversion.
