THE STUDY-APP STACK

The study apps worth installing (and the ones I’d skip)

You don’t need twenty apps. You need four that don’t overlap: Notion for notes, Anki for memory, Forest for focus, Todoist for planning. Here’s the whole stack, plus 50+ tested resources for every other study job.

Notes
Notion

One place for notes, tasks, and a simple wiki.

Free plan
Recall
Anki

Spaced repetition, the highest-ROI habit here.

Free · iOS $25
Focus
Forest

A wall between you and the phone in your hand.

~$4 once
Planning
Todoist

One home for every deadline, then trust it.

Free plan

Pick your study app by the job

Twelve jobs, one pick each, plus a free alternative. Every button goes to the app’s own site.

Notes
Notion

One place for lectures, tasks, and a wiki.

Free pick: Apple NotesGet Notion →
Recall
Anki

Spaced-repetition flashcards that stick.

Free pick: QuizletGet Anki →
AI help
NotebookLM

Summaries and quizzes from your own notes.

Free to useOpen NotebookLM →
Focus
Forest

Grow a tree while you stay off your phone.

Free pick: PomofocusGet Forest →
Planning
Todoist

One home for every deadline and task.

Free pick: Google CalendarGet Todoist →
Reading PDFs
UPDF

Annotate the 400-page textbook, with AI.

Free pick: XodoGet UPDF →
Writing
Grammarly

Catch the mistakes before you submit.

Free tier availableGet Grammarly →
Languages
Busuu

Real grammar and native-speaker feedback.

Free pick: DuolingoGet Busuu →
Handwriting
GoodNotes

iPad plus Apple Pencil, done right.

Free trialGet GoodNotes →
Citations
Zotero

Collect sources and build a bibliography.

Free and open sourceGet Zotero →
Math
Wolfram Alpha

Step-by-step solutions across subjects.

Free basic tierOpen Wolfram Alpha →
Mind maps
XMind

Turn a messy topic into a clear map.

Free tier availableGet XMind →

How I picked these study apps

I didn’t rank these best study apps by download count or star rating. I ran every one through the same five questions, the ones that predict whether a student sticks with a tool past week two.

Note-taking apps: where your thinking lives

Your notes app is the one you’ll open most, so pick for how your brain works, not for the prettiest demo.

Notion

All-in-one notes, tasks, and a wiki.

Free student planGet Notion →
Obsidian

Plain-text notes you own forever.

Free for personal useGet Obsidian →
OneNote

Freeform canvas that STEM students love.

FreeGet OneNote →
Apple Notes

Instant capture across Apple devices.

FreeGet Apple Notes →
Evernote

The veteran, still strong at web clipping.

Free tierGet Evernote →
GoodNotes

Handwritten notes on iPad, done right.

Free trialGet GoodNotes →
The full note-taking apps guide →

Flashcards and spaced repetition

If you add one app to your studying, make it a spaced-repetition flashcard app. Nothing else here moves exam scores as reliably.

Anki

The spaced-repetition gold standard.

Free · iOS $25Get Anki →
Quizlet

Fast decks you can make and share.

Free with adsGet Quizlet →
RemNote

Notes and flashcards in one place.

Free tierGet RemNote →
Brainscape

Confidence-based repetition, guided.

Free tierGet Brainscape →
Knowt

A free Quizlet alternative with AI.

FreeGet Knowt →
Cram

Simple online and mobile flashcards.

FreeGet Cram →
The science of active recall →

AI study tools

AI is great at summarizing your material and making practice questions. It’s dangerous the moment you let it write what you submit.

NotebookLM

Answers grounded only in your notes.

FreeGet NotebookLM →
ChatGPT

The everyday concept explainer.

Free tierGet ChatGPT →
Claude

Strong on long documents and reasoning.

Free tierGet Claude →
Perplexity

Cited answers built for research.

Free tierGet Perplexity →
Grammarly

Fix writing before you hand it in.

Free tierGet Grammarly →
Otter

Record and transcribe your lectures.

Free tierGet Otter →
My full AI study toolkit →

Focus and Pomodoro apps

You don’t lack discipline. You have a phone built to keep you scrolling. These put a wall between you and the distraction.

Forest

Grow a tree while you stay off your phone.

~$4 one-timeGet Forest →
Freedom

Block distractions across all devices.

Free trialGet Freedom →
Cold Turkey

The strict, no-negotiation blocker.

Free tierGet Cold Turkey →
Pomofocus

A free Pomodoro timer in your browser.

FreeGet Pomofocus →
Focus To-Do

Pomodoro timer plus a task list.

Free tierGet Focus To-Do →
Brain.fm

Music engineered for deep focus.

Free trialGet Brain.fm →

Planning and task apps

Pick one place to hold everything you have to do, and make it the only place. A to-do list spread across four apps is the real problem.

Todoist

Clean, fast task manager for students.

Free planGet Todoist →
TickTick

Tasks plus a calendar and Pomodoro timer.

Free tierGet TickTick →
My Study Life

Built around class timetables and exams.

FreeGet My Study Life →
Google Calendar

Block time, don’t just list tasks.

FreeGet Google Calendar →
Notion Calendar

A calendar that syncs with Notion.

FreeGet Notion Calendar →
Trello

Visual boards for bigger projects.

Free tierGet Trello →
Build a digital study routine →

Reading, PDF and reference apps

Most of your reading is PDFs now, and your device’s default viewer is the weak link. These handle markup, huge files, and citations.

UPDF

Annotate and edit PDFs, with AI.

Free plus paidGet UPDF →
PDF Expert

The polished Apple-ecosystem reader.

Free trialGet PDF Expert →
Xodo

Solid, genuinely free PDF markup.

FreeGet Xodo →
Adobe Acrobat

The reference PDF reader everywhere.

Free readerGet Adobe Acrobat →
Zotero

Collect sources and cite in a click.

Free, open sourceGet Zotero →
Mendeley

Reference manager plus PDF reader.

FreeGet Mendeley →
The full PDF apps guide →

Language-learning apps

If a language is on your timetable, habit apps get you moving but plateau. Pair one with spaced repetition for real progress.

Duolingo

Best for building a daily habit.

Free with adsGet Duolingo →
Busuu

Grammar plus native-speaker feedback.

Free tierGet Busuu →
Babbel

Conversation-first, structured lessons.

PaidGet Babbel →
Memrise

Vocabulary with real-speaker clips.

Free tierGet Memrise →
Pimsleur

Audio-first speaking practice.

PaidGet Pimsleur →
Anki

Spaced repetition eats vocab for breakfast.

FreeGet Anki →
The full language apps guide →

Build your stack: three setups that work

The pattern across all three: one notes app, one recall app, one focus tool, one place for time. Add a fourth category only when you feel the gap.

What I’d skip

Skip the all-in-one “study OS” templates you buy off other students, you’ll spend longer learning theirs than building your own. Skip paid “AI tutor” apps that just wrap ChatGPT for a monthly fee. And skip any app whose headline feature is that it’s aesthetic. Pretty is not a study technique.

Final thoughts: the app is not the studying

The best study apps are the ones you stop noticing. Tools are scaffolding, they hold the work up while you do it, and the work is the same as it’s always been: understand it, test yourself on it, sleep, repeat. Install the four, give them a week, and get back to studying.