Paperpile vs LineEmUp
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- 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
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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.
LineEmUp
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The LineEmUp app can be used to line up anything. You can chose a fixed alignment sight line, or a floating sight line with or without a level line. A sight line and date embossed picture can be taken by this app to prove the alignment. LineEmUp allows you to use the camera zoom for best accuracy. Here are some examples of what LineEmUp can be used for: Lining up cars, boats, RVs, trailers in open areas Lining up cars and trucks at dealerships Placing merchandise in stores Aligning construction supplies at job sites Arranging chairs at events, like weddings and graduations Planting trees Planting gardens Mowing and brush cutting on boundaries Making trails Marking athletic fields Aligning landscaping features Aligning pictures on a wall Interior decorating Aligning furniture for real estate showings Placing fence posts Confirming vertical level of posts Placing safety cones in construction zones Erecting temporary fencing for events Placing buoys Aligning windows, doors and siding during construction Aligning subjects for photo shoots Aligning booths for trade shows and conventions Aligning catered food placements Placement of outbuildings, sheds, kennels and pens Marking excavation boundaries
Screenshots
Verdict
The clearest difference is price: Paperpile at Free against LineEmUp's $0.99. Paperpile also leads on update cadence (every 2 months vs every 13 months) and iOS requirement (12.0 vs 15.6). On 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
Paperpile is free to download; LineEmUp costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Paperpile ships an update every 2 months, LineEmUp every 13 months. The most recent releases landed on October 23, 2026 and October 25, 2026 respectively.
| Parameter | Paperpile | LineEmUp |
|---|---|---|
| Price | Free — better | $0.99 |
| Rating | 4.5 (131 ratings) — better | — |
| Positive reviews | 71.6% of reviews | — |
| Number of ratings | 131 — better | — |
| Update frequency | Every 2 months — better | Every 13 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 12.0 — better | 15.6 |
| Further details — not scored | ||
| Size | 242 MB | 2 MB |
| Age rating | 4+ | 4+ |
| Developer | Paperpile LLC | Timothy Kelley |
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
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- 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
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- 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
LineEmUp
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Paperpile
No in-app purchases
LineEmUp
No in-app purchases









