Comparison

Paperpile vs DeepSecret

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

Head to head
About

Paperpile

Organize and manage your research papers effortlessly. Collect, read, and annotate PDFs from millions of academic journals. Beat paper chaos with a tidy digital library.

Highlights
  • Search millions of academic papers
  • Collect PDFs with one tap
  • Organize with folders and labels
  • Read and annotate PDFs
  • Highlight and add notes
  • Browser integration for saving
Features
Read full description

Get a head start for you research and finally beat the paper chaos on your desk. With Paperpile you have all your research PDFs in one place — nice and tidy. Paperpile makes it easier than ever to collect, manage, read, and annotate your papers. FIND & COLLECT - Search millions of papers from 20,000+ academic journals right in the app. - Add new papers to your collection with one tap and the PDF will be downloaded automatically. - Save directly from your browser to your Paperpile library - User your university's off-campus proxy access to get restricted content behind paywalls. MANAGE & ORGANIZE - Bring structure to your library with folders and subfolders - Organize your library visually with colored labels - Mark important papers with stars. - Search your library to find the paper you need fast. READ & ANNOTATE - Read like on paper with a fast and slick PDF viewer experience - Highlight important sections in different colors - Add notes and never forget an important idea. - Add hand-drawn annotations - with your fingers or your Apple Pencil The Paperpile App requires a Paperpile account.

About

DeepSecret

Features
Read full description

DeepSecret is a private AI workspace for conversations, document review, and privacy-focused data control. Start with a dedicated DeepSecret address, ask the assistant questions, attach supported documents, and keep your conversation history organized with local search and tags. Each workspace is designed around clear privacy signals, encrypted storage, and visible server status so you always know where your AI session belongs. Use DeepSecret to: - Ask questions in a private AI chat workspace. - Analyze supported PDFs and images without mixing them into a shared browser workflow. - Review encrypted chat history and find previous work quickly. - Check privacy status, server health, and monthly privacy summaries. - Burn conversations when you want local and server-side data cleared. AI responses may be incomplete or inaccurate. For legal, medical, financial, or other professional decisions, verify important information with a qualified expert. Terms of Use: https://deepsecret.ai/eula Privacy Policy: https://deepsecret.ai/privacy-policy

Screenshots

Paperpile3 screens
DeepSecret4 screens

Verdict

The call

The clearest difference is in-app purchases: Paperpile at none against DeepSecret's 2. Paperpile also leads on device support (3 vs 1) and iOS requirement (12.0 vs 17.0). On price and 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. DeepSecret sells 2 in-app purchases, starting at $2.99 per month. Paperpile asks for nothing beyond the download.

Scorecard3 real differences · 7 level
Paperpile versus DeepSecret: the parameters behind the verdict, then further details
ParameterPaperpileDeepSecret
PriceFreeFree
Rating4.5 (131 ratings) — better—
Positive reviews71.6% of reviews—
Number of ratings131 — better—
Update frequencyEvery 2 months—
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree—
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS12.0 — better17.0
Further details — not scored
Size242 MB21 MB
Age rating4+4+
DeveloperPaperpile LLCGodot Network LLC

Bugs and requests

Paperpile

Reported bugs

12 issues
  • App crashes frequently on iPad and iOS devices
  • Highlighting disappears when revisiting papers
  • Overlapping annotations delete together when removing one
  • Sync failures requiring logout/login cycles
  • Annotations not syncing between iPad and web versions
Show 7 more
  • PDF metadata recognition failures when adding papers
  • Settings reset when returning to previously edited files
  • App incompatible with older iOS versions (iOS 12)
  • Login authentication errors with university accounts
  • App crashes without reliable internet connection
  • Search functionality broken after updates
  • Annotations not saving/loading on iOS 14.4.2

Requested features

17 requests
  • Dark mode implementation
  • Edit citation metadata on mobile app
  • Change PDF file functionality
  • Save to downloads feature
  • Dictionary/lookup function for reading
Show 12 more
  • Cite while you write feature
  • BibTeX export capability
  • Ability to upload PDFs directly from mobile app
  • Support for Safari and other browsers
  • Desktop application version
  • Shared library access in mobile app
  • Advanced sorting options (by title, author, date)
  • Custom color options for annotations
  • Paste images into PDFs
  • Shape snapping for drawing tools
  • University email authentication
  • Paper rating system beyond stars

DeepSecret

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Paperpile

No in-app purchases

2 purchases

DeepSecret

Subscriptions2
  • Monthly3 Days trial$2.991 Month
  • Yearly3 Days trial$19.991 Year

Questions

Is Paperpile free?
Paperpile is free to download, with no in-app purchases.
Is DeepSecret free?
DeepSecret is free to download, with in-app purchases available.
Do Paperpile or DeepSecret have ads?
Neither Paperpile nor DeepSecret shows ads.

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