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67
BU Score
Solid

iAnnotate 4 — PDFs & more

4.7 ✍️ Editor
✍️ BU Analytics Review

iAnnotate 4 — PDFs & more is an iOS app from Branchfire, Inc. in the Productivity category, currently rated 4.7★ across 8,839 ratings. Initial signal reads as mixed reviews — supporters praise core features while critics cite stability/value gaps.

Our BU Score puts it at 67Solid (established niche player). For a Productivity app, that means established niche player.

Track changes month-over-month in the Performance section below — live snapshot history and revenue forecast included.

📊 Performance Tracking LIVE

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idle
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Rating
Reviews
Forecast Revenue / mo
Snapshots tracked
0
since first record
Range:

💰 Forecast Revenue / mo

MODEL
Revenue forecast computed from BU's 234 trigger model on each snapshot. Calibrated against ground-truth from 58 verified-revenue apps.
🔬Forecast Breakdown — Why This Estimate?Top 13 of 13 triggers
Our ML model uses 200+ signals from public data. These are the most influential for this app:
Paid app ($0.00)METRIC
+$2,800
Excellent rating (4.7★)METRIC
+$2,200
bugsREVIEW
−$1,800
5 starREVIEW
+$1,800
cancelledREVIEW
−$1,500
excellent appREVIEW
+$1,500
Low install base (8,839 ratings)METRIC
+$1,500
Mature app (10y old)METRIC
+$1,500
highly recommendREVIEW
+$1,400
slowREVIEW
−$1,200
too expensiveREVIEW
−$1,000
support teamREVIEW
+$900
Single-language (English only)METRIC
−$400
METRIC = structural app data · REVIEW = mined from user reviews · ✓ VERIFIED = Stripe-verified anchor (TrustMRR)

📈 Reviews Growth

LIVE
Cumulative review count from first BU snapshot. Each point = a tracked update.
💚Sentiment Over Time↑ green = positive · ↓ red = negative
Dec 24
Feb 25
Mar 25
Apr 25
May 25
Jun 25
Jul 25
Aug 25
Sep 25
Oct 25
Nov 25
Feb 26

⭐ Rating Trend

LIVE
Average rating evolution. Updates with each new review batch.

🗓️ Snapshot Timeline

HISTORY
Each bar shows a tracked update and the metric delta from the previous snapshot.
App Specs
🔐 Own this app? Claim & verify MRR →
💾 82 MB🔞 4+📱 iOS 15.6+🔖 v4.10.6🔄 updated 4w ago🌐 EN📂 Productivity💰 Paid🚀 Launched 2016 (10y old)

📝 About this app

iAnnotate by Folia is the best way to read, annotate, and share PDFs, Microsoft Office files, images and web pages! Over 1 million people turn to iAnnotate to take notes, sign agreements, highlight documents, insert stamps and more.

New in v4: iPhone support, iPad Pro and multitasking support, automatic Apple Pencil detection, shape annotations, improved web markup, enhanced support for OneDrive (and OneDrive for Business), iCloud Drive, and iCloud backup.

iAnnotate’s award-winning interface and customizable set of features make it the go-to app for taking notes on lecture slides, annotating important business documents, revising screenplays, grading papers, and much more. Read on to learn about the great capabilities of iAnnotate:

IPHONE: Now you can use iAnnotate on your phone, with all of the great features you’ve come to expect on your iPad.

IPAD PRO: iAnnotate works great with the iPad Pro. Automatically annotate when you use the Apple Pencil and easily pan, zoom, scroll with your fingers — no tool switching required. Get more work done with iOS multitasking and smart keyboard shortcuts.

ANNOTATE: Choose from the pen, highlighter, typewriter, stamp, straight-line, note, underline, strikeout, photo, voice recording, arrow, rectangle, circle, and date stamp tools.

CUSTOMIZE: Drag and drop tools to your custom toolbars. Swipe between toolbars, or open the Toolbox to access all your tools.

ACCESS: Connect with Box, Dropbox, Google Drive, OneDrive (including OneDrive for Business) or open PDFs directly from email and other apps.

SEARCH: Search documents in your local library and throughout your cloud storage.

SHARE: iAnnotate saves your markups directly to the PDF, so they can be viewed and edited in external PDF readers.

FLATTEN: Compress your annotations onto the document to prevent modification. This is useful for preserving signatures or for preventing recipients from deleting or changing your annotations.

WEB MARKUP: Open a web capture tab and find the site you want to mark up. iAnnotate will convert it to a PDF for annotation.

NAVIGATE: Explore your documents by thumbnails, bookmarks, annotations, or search results.

UNLIMITED TABS: Open multiple documents in tabs, and easily navigate between them, on both tablet and phone.

TWO DOCUMENTS: Work on two documents side-by-side, for even greater productivity.

MANAGE: Arrange documents by folders and sort contents by date added, date last opened, or alphabetical order.

CREATE: Create brand new PDFs with blank, lined, or graph-paper pages.

MODIFY: Add, delete, rotate, and rearrange pages in your documents.

SUMMARIZE: Forward a summary of your annotations as an email or a new PDF.

SECURE: Full support for the iOS Data Protection and Keychain functions.

Interested in using iAnnotate in your business or school? Visit us at www.folia.com to find out about our enterprise options.

🆕 What's New · v4.10.6

This release includes a major update built with the latest tools for improved performance and reliability.

Built with Xcode 26 for enhanced stability and compatibility
Fixed an issue affecting the rendering of certain PDFs
Resolved a bug related to autosave to ensure your work is preserved

Profile & Insights

Everything we know — and don't — about this app and its company.

Identification

App name
iAnnotate 4 — PDFs & more
Developer
Branchfire, Inc.
Bundle ID
com.branchfire.ia4
App Store URL
Open in App Store
Category
Productivity
Content rating
4+
Languages
EN

Company

Website
www.folia.com
Tagline
Let ideas flow like pen on paper
Description
Bring your ideas into focus with smart tools to research, annotate, and capture insights.
Founded
Not found
HQ / Address
Not found
Employees
Not found
Logo
OG image

Revenue

Verified revenue / mo
Not found
AI revenue estimate / mo
Not found
AI annual estimate
Not found
ML model estimate / mo
$660/mo
Top-grossing rank
Outside top 100 in US Productivity
All-time revenue
Not found
Pricing
Not found

Founder

Name
Not found
X / Twitter
https://twitter.com/TeamFolia
LinkedIn
https://www.linkedin.com/company/teamfolia/
GitHub
Not found
X followers
Not found
Public statements
Not found

Funding

Total raised
Not found
Last round
Not found
Investors
Not found
Crunchbase
Not found
AngelList
Not found

Press & Links

Articles found
Not found
Listed on
Not found
Blog
http://www.folia.com/blog
Press / News
Not found

Contacts & Socials

Socials
facebook · linkedin · twitter
Email
Not found
Phone
Not found
Contact page
http://www.folia.com/contact-us
About page
http://www.folia.com/about
📈Ratings growth8,839 ratings+2202% lifetimeShow 3-year history estimate ▾Jul 2022Jun 2024May 2026
Tracked (58 weeks) Pre-tracking estimate (36 weeks) · model-based, ±5% noise · anchored to release date and current value
🌍Geographic ReachNot ranked
This app is currently outside the top 100 grossing in all 9 countries we monitor (US, UK, DE, FR, JP, CA, AU, BR, IN). Niche or new apps often launch this way — popularity rankings appear once daily revenue clears the regional threshold.
Profile is built from iTunes Lookup + developer site scrape + ML revenue model. Empty fields show "Not found" — additional sources (Crunchbase, X, IndieHackers, Acquire.com) coming.
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