Buying Guide
7 Best Study and Learning Apps for Android in 2026
By Rehman Ahmad · Updated 2026-09-03 · 8 min read · 1706 words
Short answer
Studying is recall, understanding and focus, and each has a different app. AnkiDroid is the best recall tool — free, open source, and the same spaced-repetition engine students have used for years. Duolingo for sticking with a habit, Khan Academy for understanding a subject, Photomath for checking maths, and Forest for the actual sitting down. Learn once, then use the one that matches the job.
"Study" is not one activity. It is three, and they place different demands on the tools you use.
Memorise. You have to get facts into long-term memory and keep them there. This is a recall problem, and it is solved by spaced repetition.
Understand. You have to actually get a subject, not just remember its statements. This is a comprehension problem, and it is solved by teaching, examples and practice.
Sit down. You have to start, and stay, on the task — which is more of a motivational problem than most people admit.
No app does all three. The ones that pretend to end up doing none of them. The trick is to pick the one that matches the job you are actually doing, and to accept that you are running more than one of them.
Every version, size, minimum Android and licence below is the catalogue entry for the package this site serves.
The recall tools
1. AnkiDroid — the strongest recall engine, and it is free
AnkiDroid is the gold standard for the specific job of getting facts into memory and keeping them there.
- Version: v2.24.0 · Size: 37.1 MB · Android: 5.0+ · Licence: open source · Developer: AnkiDroid Open Source Team
It uses spaced repetition: every card is resurfaced at precisely the moment you are about to forget it, so your time goes exactly where the forgetting is strongest. That is the difference between Anki and every flashcard app that just cycles cards. It is free and open source, there are millions of ready-made decks, and it syncs across devices. At 4.9★ across 15,200 reviews it is a genuine favourite of medical students and language learners.
The trade is the start. Anki is not friendly. The interface is thin, there is no hand-holding, and making a good deck takes thought. If you can get past that, it is the best per-minute recall tool there is.
Pick this one if: you are serious about memorising a large body of facts, and you can invest an hour in the setup.
2. Quizlet — the friendlier one, with ready-made decks
Quizlet is the flashcard app for the person who does not want to build the deck from scratch.
- Version: v9.22.1 · Size: 36.8 MB · Android: 8.0+ · Licence: freeware · Developer: Quizlet Inc.
A huge library of decks other people have already made, plus study modes — flashcards, learn, write, test, match — and an app that is genuinely pleasant to use. At 4.8★ across 42,100 reviews it is the most popular study app here, and for good reason. If you are studying a common subject, someone has already made the deck.
The trade is the subscription. The best features sit behind a paid tier, and the free version is increasingly thin. Quizlet is the easier start; Anki is the better end state.
Pick this one if: you want to start studying in five minutes, and you will use a ready-made deck rather than building your own.
The understanding tools
3. Duolingo — the one you will actually keep doing
Duolingo is the best app here at the hardest part of learning a language: not quitting.
- Version: v5.152.4 · Size: 48.6 MB · Android: 8.0+ · Licence: freeware · Developer: Duolingo
Short lessons, streaks, gamification, a satisfying sense of momentum. It is not the best at teaching a language in depth, but it is the best at making sure you do a little bit every day, which is how a language actually gets learned. At 4.9★ across 98,400 reviews it is the most-reviewed and one of the most-loved apps on this page.
The trade is depth. Duolingo will not make you fluent, and its approach is genuinely thin on grammar. It is best treated as a habit and a first step, then paired with a real course or conversation when you are ready.
Pick this one if: you want a daily habit that a language actually requires, and you want it to feel effortless.
4. Khan Academy — the one that teaches properly, free
Khan Academy is the rare app that is both genuinely educational and genuinely free.
- Version: v7.62.0 · Size: 28.4 MB · Android: 7.0+ · Licence: freeware · Developer: Khan Academy
Full courses, real video lessons, practice problems with instant feedback, and a progression from kindergarten through to high school and beyond — maths, science, economics, humanities. It is a real teaching product, not a gamified toy, and it is free with no subscription and no meaningful paywall. At 4.8★ across 34,200 reviews it is one of the strongest value-for-nothing apps here.
The trade is structure. It is a course, so you do the work in sequence, and you need the discipline to sit down and do it. It gives you the material, not the motivation.
Pick this one if: you want to actually understand a subject, and you want it free and taught properly.
5. Photomath — the one that shows the working
Photomath is the maths check that shows you how, which is the difference between a tool and a crutch.
- Version: v8.34.0 · Size: 34.2 MB · Android: 7.0+ · Licence: freeware · Developer: Google LLC / Photomath
Point the camera at a problem, and it reads it and solves it with a step-by-step working that you can read, not just a number. That makes it a check on your own work and a way to see where you went wrong, rather than a way to skip the thinking. At 4.9★ across 78,200 reviews it is one of the best-regarded apps on this page for a reason.
The trade is that some steps and some features sit behind a subscription, and it is not a substitute for learning the method. It is a check, not a teacher.
Pick this one if: you are doing maths and you want to verify your working, or see the steps of a problem you are stuck on.
The focus tools
6. Forest — the one that makes you put the phone down
Forest does something genuinely different from the rest of this list: it helps you not be on it.
- Version: v4.75.0 · Size: 76.4 MB · Android: 7.0+ · Licence: freeware · Developer: Seekrtech
You plant a virtual tree, and it grows while you leave the phone alone. If you open an app that is not on your allowlist, the tree dies. It is a Pomodoro-style focus timer dressed as a tiny act of responsibility, and the shame of killing a tree is a surprisingly good motivator. At 4.9★ across 7,890 reviews it is niche but very well loved.
The trade is that it is 76.4 MB — the heaviest app here, which is a lot for something that is just a timer — and several of the nicer tree species and features sit behind a one-time paid upgrade. It is not a study tool, it is a focus tool, and it should sit alongside the others rather than replace them.
Pick this one if: the hardest part of studying for you is starting, and you want a reason not to pick up the phone.
The reading tool
7. Moon+ Reader — the one for taking it in
Moon+ Reader is the reading app for the person who studies from books, because it is the best at the reading itself.
- Version: v9.3.0 · Size: 34.2 MB · Android: 6.0+ · Licence: freeware · Developer: Moon+ (Flyersoft)
EPUB, PDF and Mobi support, a huge range of theming and font settings, text-to-speech, annotations, and a genuinely comfortable reading experience. If your study material is a book rather than a deck, this is the tool that makes it readable. At 4.9★ across 6,840 reviews it is very well regarded by the people who use it.
The trade is that it is a reader, not a study machine. It does not quiz you, it does not track progress toward a goal, and the pro features sit behind a one-time purchase. It is the reading part of the study loop, not the whole loop.
Pick this one if: your studying is mostly reading long-form material, and you want it comfortable rather than merely functional.
The seven, side by side
| App | Job | Size | Android | Licence | Best for |
|---|---|---|---|---|---|
| AnkiDroid | Recalling | 37.1 MB | 5.0+ | Open source | Memorising a lot, free |
| Quizlet | Recalling | 36.8 MB | 8.0+ | Freeware | Ready-made decks |
| Duolingo | Understanding | 48.6 MB | 8.0+ | Freeware | A daily language habit |
| Khan Academy | Understanding | 28.4 MB | 7.0+ | Freeware | A real course, free |
| Photomath | Understanding | 34.2 MB | 7.0+ | Freeware | Checking maths working |
| Forest | Focusing | 76.4 MB | 7.0+ | Freeware | Putting the phone down |
| Moon+ Reader | Reading | 34.2 MB | 6.0+ | Freeware | Reading study books |
What none of these fix
None of them teaches you to sit down. They give you the material and the tools; the discipline is yours. Forest is a nudge, not a solution.
None of them works without your own effort. A spaced-repetition deck you do not open, or a course you do not watch, is a very well-made way to learn nothing.
Free and free-tier are different words. AnkiDroid and Khan Academy are genuinely free. Duolingo, Quizlet and Photomath have real, useful free tiers and real, meaningful subscriptions behind them. Budget accordingly.
An app cannot replace a teacher. These are excellent tools for the parts of learning that are repetition and self-checking. For the parts that are explanation, feedback and motivation, a human still wins.
The two-minute version
Memorise a lot, free? AnkiDroid — the best spaced-repetition engine, open source.
Start studying in five minutes? Quizlet — ready-made decks and a friendly app.
Build a habit? Duolingo for language, Khan Academy for a real free course.
Check the maths? Photomath.
Put the phone down? Forest.
Every app named here resolves to a page in the FileCobra catalogue — the build fails if one does not. Versions, package sizes and system requirements are read from that catalogue rather than written by hand. Where our ingestion worker has fetched a release itself, it records a SHA-256 of the exact file we serve and publishes it on the app’s page. We do not run an antivirus lab: where a VirusTotal report exists we link it, and where none exists we say so rather than imply one.
Rehman Ahmad
VERIFIED AUTHORChief Technology Officer & Lead Systems Auditor at FileCobra
Rehman specializes in Android operating system internals, cryptographic integrity verification, reverse engineering APK packaging architectures, and high-performance audio/video DSP pipelines. He directs the security verification and release ingestion infrastructure across FileCobra.
Apps covered in this guide
-
AnkiDroid
2.24.1 · 37.12 MB · Open Source
-
Quizlet
9.22.1 · 47.27 MB · Freeware
-
Duolingo
5.152.4 · 170.59 MB · Freeware
-
Khan Academy
7.62.0 · 30.15 MB · Freeware
-
Photomath
v8.34.0 · 34.2 MB · Freeware
-
Forest
4.75.0 · 223.69 MB · Freeware
-
Moon+ Reader Pro
v9.3.0 · 34.2 MB · Freeware
Frequently asked questions
AnkiDroid or Quizlet — which flashcards?
AnkiDroid at v2.24.0 is the more powerful recall engine: it uses spaced repetition, so it resurfaces exactly the cards you are about to forget, and it is free and open source with no account wall. Quizlet at v9.22.1 is the more social and the prettier one, with ready-made decks and better on-the-go study modes, but it runs on a subscription for several features. Choose Anki if you want the best recall per minute, Quizlet if you want to use someone's already-built deck and a gentler onboarding.
Which one is actually free with no limit?
AnkiDroid is genuinely free and open source, and Khan Academy at v7.62.0 is free in the real sense — no paywall, no subscription, a genuine education charity. Forest at v4.75.0 is free to use with a one-time paid upgrade for extras. Duolingo, Quizlet and Photomath each gate meaningful features behind a subscription, so 'free' there means 'free tier' rather than 'free'.
Is scanning a maths problem with Photomath cheating?
No, if you use it the way it is meant to be used. Photomath at v8.34.0 shows you the working, not just the final number, so it is a check on your own solution and a way to see where you went wrong. The problem is when you use it to skip the thinking. The app itself is a tool; whether it is a shortcut or a crutch is a decision you make.