Comparison

Stactra vs Foldline

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

Head to head
About

Stactra

Features
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Stactra keeps you company while you read. Open the book you're reading and save where you are. With Stactra, talk it through up to the point you've reached and share your thoughts. If something stays on your mind, write it down as a note or a quote. Stactra is there to be your friend. Every book you finish becomes a star in your own sky. Over time that sky starts to look like you: the stories you keep coming back to, the ones you finished in a weekend, the ones that lasted a season. What you get • You can talk with Stactra about every chapter you read. • Keep your book notes so Stactra gets to know you and tells you which book you need. • Road: set out on a journey with books that never ends. • Achievements and a Year in Review you can share as a story card • One library for what you're reading, want to read, and have finished Stactra Plus adds longer conversations about your notes and a personalized Road. The free app has no ads and no time limit. Let Stactra get to know you, so it knows which book bored you and which one you finished in a single sitting. It will recommend books to match. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

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

Stactra4 screens
Foldline4 screens

Verdict

The call

The clearest difference is update cadence: Stactra at every 4 days against Foldline's every 8 days. On price, ads, 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. Stactra sells 4 in-app purchases, starting at $4.99 per month and Foldline sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Stactra ships an update every 4 days, Foldline every 8 days. Both last shipped on October 31, 2026.

Scorecard1 real difference · 5 level
Stactra versus Foldline: the parameters behind the verdict, then further details
ParameterStactraFoldline
PriceFreeFree
Update frequencyEvery 4 days — betterEvery 8 days
AdsNoNo
In-app purchasesYesYes
DevicesiPhoneiPhone, iPad — better
Requires iOS18.618.0 — better
Further details — not scored
Size58 MB7 MB
Age rating12+4+
DeveloperGokhan CaliskanANDREI RUSTI

In-app purchases

4 purchases

Stactra

Subscriptions2
  • Stactra Plus Monthly$4.991 Month
  • Stactra Plus Annual7 Days trial$29.991 Year
One-time2
  • 10 Stactra Credit$0.99
  • 100 Stactra Credit$6.99
1 purchases

Foldline

One-time1
  • Foldline Pro$4.99

Questions

Is Stactra free?
Stactra is free to download, with in-app purchases available.
Is Foldline free?
Foldline is free to download, with in-app purchases available.
Do Stactra or Foldline have ads?
Neither Stactra nor Foldline shows ads.
Which is updated more often, Stactra or Foldline?
Stactra ships an update every 4 days, and Foldline every 8 days. Most recently, Stactra was updated on October 31, 2026 and Foldline on October 31, 2026.

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