Liner: AI Search with Sources

Contains adsIn-app purchases
4.2
4.26K reviews
5L+
Downloads
Content rating
Teen
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About this app

Get reliable information with Liner AI Search Engine.
Liner is the AI search engine trusted by 10 million+ students and researchers worldwide. Built for academic research, Liner delivers accurate, source-backed answers you can trust.


[Why Liner?]

1. Credible Answers with References: Get answers from verifiable academic sources, including peer-reviewed papers.
2. Line-by-line citations: Every line of an answer includes a citation, so you always know where the information comes from.
3. AI Summaries: Simplify complex research papers, articles, and videos with clear AI-powered summaries and key takeaways.
4. Follow-up Questions: Explore deeper with smart follow-up queries, just like having your own AI copilot for research.

Try Liner on your desktop for deeper research workflows. All your data is synced across devices.

Upgrade to Liner Pro to access advanced AI models and powerful tools like Deep Research and file uploads.


[What's New]

1. Scholar mode
- Get answers only from trusted academic sources. Perfect for assignments, essays, and literature reviews.

2. One-click citation
- Instantly generate citations in APA, MLA, or Chicago style.

3. Upload an image
Take a photo of printed materials and ask questions about the content.


Liner is loved by 10,000,000+ students and researchers across 50+ countries.
Download Liner today and start your smarter research journey.
If you love Liner, please rate us on the App Store!
Updated on
13 Aug 2025

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region and age. The developer provided this information and may update it over time.
This app may share these data types with third parties
Location, Personal info and 3 others
This app may collect these data types
Location, Personal info and 6 others
Data is encrypted in transit
You can request that data be deleted

Ratings and reviews

4.2
4.02K reviews
Vicky S (Cooksalot)
29 August 2023
Was useful when you could highlight what you needed to highlight. Really liked being able to save and file things away. With the new liner it's all gone. The whole reason I was using liner is gone. Don't care for the new ai business. Now I have to figure out how to get my files out of this. Don't recommend this app anymore. It's not the original version.
59 people found this review helpful
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Liner
30 August 2023
Hi, Vicky. In the updated LINER, you can still highlight and save the parts you want to highlight. LINER is smarter and will help you. If you're not sure how to use it or have any other questions, please contact our help center. Thank you.
Dylan Kinnett
7 March 2023
Liner provides a good way to capture highlights as you read, but no good way to use the highlights. It should be easy to export your highlights for use with writing or a notes app. To do this in Liner, you have to hit a button over and over for every single highlight individually. It's an annoying waste of time. There’s no API or even a “download all” button. Without this, Liner is not for me.
89 people found this review helpful
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Amanda E.
27 June 2022
I've given this app plenty of years and opportunity to grow and work out the kinks, but I'm done waiting. I was patient when my highlights were in the wrong places when I would go back to look over them at a later date. I was patient when my highlights wanted to move all over the page as I was highlighting. And now after the most recent update when I attempt to highlight, the highlighting button stays hidden behind the options to "cut/copy/select all". Time to move on to better things.
162 people found this review helpful
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What's new

[Scholar mode]

- Get answers only from trusted academic sources. Perfect for assignments, essays, and literature reviews.

[One-click citation]

- Instantly generate citations in APA, MLA, or Chicago style.

[Upload an image]

- Take a photo of printed materials and ask questions about the content.

Liner is loved by 10,000,000+ students and researchers across 50+ countries.

Download Liner today and start your smarter research journey.

If you love Liner, please rate us on the App Store!