Comparison

Outliner vs PDF Indexer

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

Head to head
About

Outliner

Organize your notes, lists, and to-dos with a powerful outliner. Add rich detail to your thoughts and keep everything in one dynamic place. Quickly find and manage your entries with intuitive search and completion features.

Highlights
  • Multi-functional outliner
  • Add detailed notes
  • Dynamic design
  • Quick search
  • Mark as complete
Features
Read full description

Scroll - Outliner for Notes, Lists & To-Dos Scroll is a modern outliner that turns scattered thoughts into a clear, structured record of everything on your mind. Notes, checklists, to-dos, plans, and ideas - all in one app, organized exactly the way you think. Most notes apps force you to choose: a quick list here, a long-form note there, a to-do app somewhere else. Scroll brings them together. Nest your notes as deep as an idea needs to go, collapse what you're not working on, and keep a precise, detailed record of your thinking without ever leaving the app. WHY YOU'LL LOVE SCROLL - Infinite outlining - Break any idea down into sub-points, then sub-points of those. Add as much detail as you want and keep it all neatly organized. - Everything in one place - Replace your notes, lists, and to-do apps with a single dynamic workspace that adapts to whatever you're capturing. - Instant search - Jump straight to the exact note you're looking for and start writing in seconds. No scrolling, no folders to dig through. - Track your progress - Mark items complete or cross them off to see what's done and what's left at a glance. - Built for focus - A clean, dynamic design that gets out of your way so you can think clearly and write freely. Subscription terms: - The subscription auto-renews at the end of each term. - Payment will be charged to iTunes Account at confirmation of purchase. - The subscription automatically renews unless auto-renew is turned off at least 24-hours before the end of the current period. - Account will be charged for renewal within 24-hours prior to the end of the current period. - You may manage your subscription and turn off auto-renewal by going to your Account Settings after purchase. Privacy policy and Terms of Use: https://applorium.com/privacy-scroll

About

PDF Indexer

This app creates fast navigation for PDFs by turning title-to-page mappings into searchable indexes. It allows you to import mappings from various file formats and opens directly to the mapped page within the PDF. All data is stored locally on your device for privacy.

Highlights
  • Search across multiple indexed PDFs
  • Exact, prefix, substring, and alias matching
  • Jump directly to mapped pages
  • Import mappings from CSV, JSON, XLSX, and text
  • Page-offset calibration
  • Mapping correction and export
  • Local-first data storage
Features
Read full description

PDF Indexer turns a separate title-to-page mapping into fast navigation for a PDF. Choose a PDF, add its index, and search titles across your library. On import, the app divides the PDF into private on-device sections at indexed title pages and removes its temporary full-size copy. A result opens only the matching section at the mapped PDF page. Page offsets handle documents whose printed page numbers do not match their PDF positions. Import mappings from CSV, JSON, XLSX, pasted text, or manual entry. Review validation warnings before saving, correct individual rows later, replace a mapping without copying the PDF again, and export a mapping as CSV or JSON. PDF Indexer is local-first. It needs no account and has no publisher-operated analytics or app-run cloud service. Your app library stays in private device storage unless you choose to export a mapping. The free app may show non-personalized banner ads after any required privacy choices. PDFs, mappings, titles, and searches are not sent to the ad service. See the Privacy Policy for operating-system backup details. Highlights: • Search across multiple indexed PDFs • Exact, prefix, substring, and alias matching • Jump directly to mapped pages • CSV, JSON, XLSX, pasted-text, and manual mapping input • Page-offset calibration and bounds validation • Mapping correction, replacement, and export • Missing-file recovery without losing the mapping • Light and dark appearance PDFs and mappings are supplied by the user. PDF Indexer does not include third-party books or indexes.

Screenshots

Outliner4 screens
PDF Indexer4 screens

Verdict

The call

The clearest difference is in-app purchases: PDF Indexer at none against Outliner's 3. PDF Indexer also leads on update cadence (every 2 days vs every 2 months) and rating (5.0 vs 4.7). Outliner's advantage is ads (none vs shown) and ratings volume (66 vs 2). On price and iOS requirement 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. Outliner sells 3 in-app purchases, starting at $3.99 per month. PDF Indexer asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

PDF Indexer holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: Outliner has 66 ratings behind it against 2, so its average is the more settled of the two.

UpkeepUpdate frequency

Outliner ships an update every 2 months, PDF Indexer every 2 days. The most recent releases landed on November 3, 2026 and October 31, 2026 respectively.

Scorecard7 real differences · 3 level
Outliner versus PDF Indexer: the parameters behind the verdict, then further details
ParameterOutlinerPDF Indexer
PriceFreeFree
Rating4.7 (66 ratings)5.0 (2 ratings) — better
Positive reviews77.1% of reviews—
Number of ratings66 — better2
Update frequencyEvery 2 monthsEvery 2 days — better
AdsNo — betterYes
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesAd-supported — better
DevicesiPhone, iPad, iPod, Mac — betteriPhone, iPad
Requires iOS15.0 — better16.4
Further details — not scored
Size8 MB53 MB
Age rating4+4+
DeveloperApplorium LtdMATTHEW BYONG BAE

Customer experience

Outliner

All ratings65 ratings
Positive92.3%
Neutral4.6%
Negative3.1%
Written reviews35 reviews
Positive77.1%
Neutral11.4%
Negative11.4%

PDF Indexer

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

3 purchases

Outliner

Subscriptions2
  • Monthly Subscription$3.991 Month
  • Yearly Subscription3 Days trial$9.991 Year
One-time1
  • Scroll Premium$19.99
None

PDF Indexer

No in-app purchases

Questions

Is Outliner free?
Outliner is free to download, with in-app purchases available.
Is PDF Indexer free?
PDF Indexer is free to download, with no in-app purchases.
Which has better reviews, Outliner or PDF Indexer?
PDF Indexer is rated higher. Outliner averages 4.7 out of 5 from 66 ratings, while PDF Indexer averages 5.0 from 2 ratings.
Do Outliner or PDF Indexer have ads?
PDF Indexer shows ads; Outliner does not.
Which is updated more often, Outliner or PDF Indexer?
Outliner ships an update every 2 months, and PDF Indexer every 2 days. Most recently, Outliner was updated on November 3, 2026 and PDF Indexer on October 31, 2026.

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