The best apps for reading research papers on iPhone in 2026

By Koray Özcan · Updated October 10, 2026

The right app depends on the job. For a daily habit of reading real papers, use a discovery app such as Nerdi or R Discovery. To manage the sources for a thesis, use a reference manager such as Zotero or Paperpile. For arXiv preprints and discussion, use alphaXiv. This guide compares six apps on what each does best, what it costs and where it falls short.

The short answer

Prices are US prices at the time of writing, and they change. Check each App Store page before you buy.

Nerdi: a few real papers a day, with no AI

Nerdi shows three papers a day from the fields you pick, out of 20 from medicine to the humanities. You read each paper's original abstract, exactly as the authors wrote it, and open the free PDF in the app when one exists. There are no AI summaries and no account is needed. Papers come from OpenAlex, an open catalog of scholarly research.

• Good: a small, fixed amount of reading each day; every paper links to its source; free to read.
• Limits: iPhone only. It is a reading app, not a citation manager, although Plus exports your library as BibTeX or RIS.
• Price: free; Nerdi Plus is $29.99 a year or $4.99 a month for an unlimited library, notes, offline PDFs, export and sync.

R Discovery: the biggest feed

R Discovery builds a personalised feed from topics you choose and can connect to your library for paywalled articles. It has a large following: 4.8 stars from 922 ratings on the US App Store in October 2026 (App Store). Its Prime subscription adds audio, translation and AI features (R Discovery Prime).

• Good: broad coverage, institutional access, alerts.
• Limits: you need an account, and some reviewers call it slow.

Researcher: journals you follow

Researcher shows new papers from the journals and topics you follow. It reached one million users about 18 months after launch (STM Publishing). It suits readers who already know which journals matter to them.

Zotero: the free reference manager

Zotero is free and open source, with a library that syncs between your computer and the iOS app. It is the standard choice for collecting and citing sources on a budget. Some users on its forum report that the iOS app forgets which paper they were reading (Zotero forums). Zotero is for managing papers you have already found, not for discovering new ones.

Paperpile: citations for Google Docs and Overleaf

Paperpile is a paid reference manager built around the browser, with citation tools for Google Docs. Plans start at about $4.15 a month billed yearly, with academic discounts (Paperpile pricing). On iOS, reviewers ask for more export and PDF upload options (App Store).

alphaXiv: arXiv with discussion

alphaXiv lets you read arXiv preprints and discuss them with other readers. On the web you can swap "arxiv" for "alphaxiv" in any paper's address (IEEE Spectrum). It suits physics, maths and computer science readers.

How to choose

1. If you want to read more papers, regularly, start with Nerdi or R Discovery. Choose Nerdi if you want the original abstracts and no AI; choose R Discovery if you want institutional access and a bigger feed.
2. If you are writing a thesis or paper, you need a reference manager: Zotero if you want free, Paperpile if you write in Google Docs.
3. You can use both kinds: Nerdi for finding papers, and Zotero or Paperpile for citing them. Nerdi Plus exports BibTeX and RIS for that reason.

Written by the developer of Nerdi, one of the apps mentioned.