AddToPDF vs Foldline
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
AddToPDF
Easily edit PDFs on your iPhone or iPad. Scan documents, add text, sign, and fill forms directly on your device. Enjoy a private, offline experience with a one-time purchase.
- Scan documents with camera
- Add text and signatures
- Fill PDF forms
- Reorder, rotate, delete pages
- Offline functionality
- One-time purchase
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Simple PDF editor for iPhone and iPad. Scan a paper document with your camera, or open a PDF from Files, Mail, or any app. Add text, sign it, fill in the form — then send it back. No subscription. No cloud. No account. One purchase covers iPhone, iPad, and Mac. Works fully offline. —— WHAT YOU CAN DO —— • Scan paper documents with the camera — several pages become one PDF. • Open PDFs from Files, Mail, Messages, or any app that can share. • Add text anywhere on the page — type it, then place it with your finger. • Sign with your finger — draw, type, or reuse a saved signature. • Fill existing PDF forms — text fields, checkboxes and dropdowns, detected automatically. • Reorder, rotate, delete and add pages. • Send the finished PDF anywhere — Files, Mail, Messages, or another app. —— MADE FOR YOUR THUMB —— Open a document. Tap what you want to change. That's it. No tutorial, no nested menus, nothing to set up. —— PRIVATE BY DESIGN —— Everything happens on your device. Your documents are never uploaded, and there is no account to create. —— WHO IT'S FOR —— • Anyone who needs to sign a form and send it back, right now • Freelancers and consultants signing contracts on the move • Parents filling in school and medical forms • Anyone tired of paying every month just to edit a PDF —— ABOUT ADDTOPDF —— Made by Mantra Factory — a small studio building simple, honest apps that respect your time. Pay once, use it forever. Requires iOS 14 or later. Works on iPhone and iPad.
Foldline
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Paper in. Searchable PDF out. Foldline is a PDF editor and scanner for iPhone and iPad. Scan paper into PDFs, change the text on a page, fill in and sign forms, mark up pages, and merge, split, compress, redact or convert files. Everything happens on your device: no account, no uploads, no internet connection needed. FREE, AND PRO FOR LIFE • Free: scan to PDF, images to PDF, fill and sign forms, highlight and mark up, reorder and rotate pages, and search and share your PDFs. • Foldline Pro, a one-time purchase, unlocks the rest: editing a page’s text, text recognition (OCR), merge, split and extract, compression, redaction, password protection, watermarks, and PDF to images or text. • Try every Pro tool except Merge on one PDF for free before you buy. • No subscription: buy once, use it on all your devices with your Apple Account. SCAN PAPER TO PDF • Scan receipts, letters, contracts and forms. The camera finds each page’s edges and straightens it. • Capture many pages into one PDF, then crop, rotate, reorder or retake any of them. EDIT THE TEXT ON THE PAGE (PRO) • Double-tap a paragraph or a table cell and type. Fix a date, a name or a price in seconds. • Choose the font, size, bold, italic, underline, alignment and color. • The old words are removed from the page, not hidden, so they can’t be found or copied later. • On a scanned page the words are part of the picture, so they’re covered with the page’s color instead. FIND ANY WORD, EVEN IN SCANS (PRO) • Text recognition (OCR) makes scanned pages searchable, here and in other apps, so you can find, select and copy their words. • Reads English, Spanish, French, German, Italian, Portuguese, Chinese, Japanese, Korean and more. FILL & SIGN • Type into PDF form fields, check boxes and choose options. • On scanned or flat forms, add text and check marks wherever you need them. • Draw your signature once and reuse it, with the date beside it if you like. HIGHLIGHT & MARK UP • Highlight, underline and strike through text. • Draw with a pen or marker, and erase strokes you don’t want. • Add text, sticky notes, links, and shapes such as arrows, stars and check marks. • Your original stays untouched until you tap Save. ORGANIZE PAGES • Reorder, rotate, duplicate and delete pages in a thumbnail grid. • Pro: merge PDFs into one, in the order you choose. • Pro: split a PDF by page ranges, or extract chosen pages into a new file. COMPRESS & CONVERT • Pro: compress a PDF so it’s easy to email or upload. Only photos and scans shrink; text, links and form fields stay as they are. • Images to PDF: combine JPEG, PNG and HEIC images into one document. • Pro: PDF to images, as PNG or JPEG at screen, standard or high resolution. • Pro: PDF to text, as a .txt file. Scanned pages are recognized first. REDACT & PROTECT (PRO) • Redact names, account numbers and signatures: find every match, select text, draw a box or mark a whole page. • What’s under the boxes is removed from the new PDF, not just covered, so it can’t be searched, copied or uncovered. • Password-protect a PDF, and limit printing, copying and changes. • Stamp a text or image watermark, such as CONFIDENTIAL or your logo, on the pages you choose. PRIVATE BY DESIGN • Your documents stay on your device. Nothing is uploaded, not even for text recognition. • No account, no ads, no tracking, no subscription. • A file leaves the app only when you share or export it. THE DETAILS • Open PDFs from Mail, Files and other apps with the Share button. • If the app closes mid-edit, your unsaved changes are kept. • Supports Dark Mode and larger text sizes. GOOD TO KNOW • Your signature is a handwritten mark on the page, not a certificate-based digital signature. • Edited text is set in one of six common fonts, matched as closely as possible to the original. • If a drawing runs under a redaction box, that page is saved as a picture of the page, without selectable text. Questions or ideas? Email rustiandrei@outlook.com.
Screenshots
Verdict
The clearest difference is price: Foldline at Free against AddToPDF's $2.99. AddToPDF's advantage is in-app purchases (none vs 1) and device support (4 vs 2). On ads 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
Foldline is free to download; AddToPDF costs $2.99 up front. Foldline sells 1 one-off in-app purchase. AddToPDF asks for nothing beyond the download.
| Parameter | AddToPDF | Foldline |
|---|---|---|
| Price | $2.99 | Free — better |
| Positive reviews | 100.0% of reviews | — |
| Update frequency | — | Every 8 days |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Paid | — |
| Devices | iPhone, iPad, iPod, Mac — better | iPhone, iPad |
| Requires iOS | 14.0 — better | 18.0 |
| Further details — not scored | ||
| Size | 6 MB | 7 MB |
| Age rating | 4+ | 4+ |
| Developer | DENIS SAUVE | ANDREI RUSTI |
In-app purchases
AddToPDF
No in-app purchases
Foldline
- Foldline Pro$4.99









