Everyone recommends the same apps. These five are the ones that don’t get enough attention — each one solves a real daily problem in a way that feels obvious once you’ve installed it.
Short Answer: The most useful underrated Android apps right now: 1Password or Bitwarden for passwords, Libby for free library books, Tasker for automation, Obsidian for note-taking, and Files by Google for storage management. None are flashy, all are genuinely useful every day.
1. Bitwarden — Free Password Manager
Reusing passwords is the single biggest security risk on the internet. Bitwarden generates and stores unique passwords for every site and auto-fills them in any browser or app. It’s completely free for individuals and open-source so the code is publicly audited.
Once you switch to a password manager, logging in becomes faster and more secure simultaneously. It works across Android, iOS, Windows, Mac, and Chrome.
2. Libby — Free Library Books on Your Phone
Libby connects to your local library card and gives you access to thousands of free ebooks and audiobooks. No subscription, no cost — just your library card. The collection is surprisingly good, and you can read in the Libby app or send books directly to your Kindle.
If you read even one book a month, Libby pays back the two minutes it takes to sign up with thousands of dollars in ebook savings over time.
3. Tasker — Automate Anything on Your Phone
Tasker is the most powerful automation app on Android. Create rules like: “When I connect to my home Wi-Fi, turn on Bluetooth and set volume to 70%,” or “When I plug in headphones, open Spotify.” The learning curve is real, but it’s worth it for repetitive daily tasks.
There are community task packs for common use cases if you don’t want to build from scratch. Available on Play Store for ~$3.50 (one-time purchase).
4. Obsidian — Best Note-Taking App for Thinkers
Obsidian stores all your notes as plain text Markdown files on your device — no proprietary format, no subscription required. It has linking between notes, a graph view of how your notes connect, and a massive plugin ecosystem. For anyone who takes notes seriously, it’s significantly more powerful than Google Keep or Notion for personal knowledge management.
Free for personal use. Sync across devices costs $4/month (or use free options like Syncthing).
5. Files by Google — Better Than Your Default File Manager
Files by Google does everything a basic file manager does, but adds smart cleaning suggestions (duplicate files, blurry photos, large files), offline file sharing via Bluetooth (no internet needed), and a better interface than most manufacturer file managers. It’s free and works on any Android phone.
📸 SCREENSHOT NEEDED: Files by Google Clean tab showing categories of junk files and duplicate photos with GB savings
If you install only one:
Bitwarden — password reuse is the most exploited security vulnerability for ordinary people, and a free password manager eliminates it entirely.
Quick checklist:
- ✅ Bitwarden: free password manager, works everywhere, open-source and audited
- ✅ Libby: free ebooks and audiobooks via your library card — zero cost
- ✅ Tasker: automate phone tasks with powerful if-this-then-that rules
- ✅ Obsidian: personal note-taking with linked notes and plain-text storage
- ✅ Files by Google: smarter storage management and offline file sharing
FAQ
Is Bitwarden safe to use?
Yes. Bitwarden is open-source (code is publicly audited), end-to-end encrypted, and has passed independent security audits. It’s consistently recommended by security researchers as the best free password manager.
How do I get started with Libby?
Download Libby, enter your library card number (from any public library you’re a member of), and search for books. If there’s a wait for popular titles, join the waitlist — you get notified automatically when your turn comes.
Is Tasker difficult to learn?
The full feature set is complex, but simple automations are accessible. Start with a community-shared task (there are thousands on Reddit r/tasker), import it, and modify it. That’s easier than building from scratch.
Best Android Apps ↗Best Productivity Apps for Android
These five apps solve problems you deal with daily but may have just accepted as unavoidable friction. Bitwarden and Libby in particular have near-zero downsides for the value they provide.