A community-powered Android caller ID, dialer and spam/scam call blocking app, built with Jetpack Compose
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ShieldCall is a free, open-source Android app that tells you who is calling before you pick up. When a call comes in, a card shows whether the number is a saved contact, spam, or a scam. It can also be your full phone app: place calls, answer them, and manage multiple calls from one place. You can look up any number, see how other people rated it, and leave your own review. Decide what to block, and ShieldCall handles the rest.
"Your calls, no trouble"
- A card appears as soon as a call comes in, showing the contact name, number and safety ranking
- Hints for unknown numbers, such as "Toll-free line, usually a company" or community labels like "Restaurant"
- Rate a number as Safe, Spam or Scam right after a call ends, without opening the app
- When ShieldCall isn't your default phone app, it shows a small card over your current screen. You can turn off the full-screen call option in Settings
- Automatic call lookup only applies when ShieldCall isn't your default phone app
- Warns you before calling back foreign numbers from one-ring scams and premium-rate numbers
- A full dialer with a searchable keypad, contact suggestions as you type, and a redial key
- Speed dial: hold keys 1 to 9 to call a saved contact, set up from the speed dial editor
- Multiple calls: Decline, Hold & accept, End current call & accept, Swap and Merge
- Dual SIM: choose which SIM to call from, and see which SIM an incoming call arrived on
- Audio routing for phone speaker, wired headsets and Bluetooth devices
- Decline with a reason: send a preset or custom text to the caller when you can't pick up
- Ongoing call notification with End, Mute and Speaker, so you can leave the app mid-call
- The screen dims when the phone is near your face, so your cheek can't hang up or mute the call
- Emergency numbers work and skip every ShieldCall extra. Test them in Settings without dialing
- Voicemail from the dialer, and voicemail alerts with a Listen button
- Silence the ring as a blocking option, so the call goes to your history without ringing
- Missed call alerts with the caller's safety ranking, a time-of-ring note, and two buttons: Call back and Call back in an hour
- Missed calls today card on the Lookup screen, which opens your missed call history
- Flash on call: the torch blinks while the phone rings, so you notice it from across the room
- Mute when face down: a call mutes itself and the mic when the phone is lying face down
- Birthdays: add a birthday to a contact. A cake icon shows on their details on the day, and you get a reminder to call them
- Post-call notes: when an answered call ends, you can add a private note about it
- Look up any number with a searchable country code picker, or paste one from the clipboard
- Numbers are validated for the selected country, so typos are caught before you search
- See the trust score, vote counts, reviews and the last few calls with that number
- Share a number's safety summary from the top bar
- Private notes on any number, visible only to you
- Always allow a number, so its calls get through whatever your blocking rules say
- Shortcuts for Call, Message, Favorite, Block/Unblock and Edit (for saved contacts)
- Add to contacts for unknown numbers in one tap
- Vote a number Safe, Spam or Scam, and optionally tag the kind of call or place
- Change or remove your vote at any time
- One vote per Google account per number, so one person can't flood a number with votes
- Write a short review, and post it under your name or anonymously
- Like helpful reviews, sort by Newest or Most liked, and load more
- Report reviews that look unfair or abusive. Reviews reported by several people are hidden
- Report a wrong label when a number's label looks incorrect. Moderators see these reports
- Contributor badges (Bronze, Silver, Gold) based on how many numbers you've voted on. They show on your profile and next to your reviews
- Browse your contacts with photos, and tap any contact to see their details
- Merged duplicate entries, so the same number saved in different formats shows as one contact
- Favorites strip at the top of Contacts for one-tap calls
- Add contacts and edit contacts (name, numbers, emails, birthday and call background) right in the app. Changes sync with your Google account
- Call history with incoming, outgoing, missed, declined, silenced and blocked calls, grouped repeats, filters, and swipe to call or delete
- Block or unblock any contact or number with one tap
- Block calls from Spam & scam, Businesses, Other countries, Unknown numbers, Unsaved numbers, or numbers starting with a prefix
- When a call matches, choose to hang up, block the number, or silence it
- Quiet hours: during set hours, calls from unsaved numbers are handled by your chosen action
- Blocklist manager for numbers, names, countries and prefixes
- Always allowed list for numbers that should never be blocked
- Blocked calls log with an Unblock button for numbers on your list
- How many calls you've identified as Spam, Scam and Safe, with a tap to see the numbers and change their votes
- Daily, weekly and monthly activity graphs
- Your activity: votes, reviews and lookups
- Estimated time saved by hanging up on blocked calls
- Blocked call insights: your busiest time, where calls come from, and repeat callers
- Protect the app with a PIN or your fingerprint
- Keeps your lookups, blocked numbers and call history private if someone else picks up your phone
- Light and dark themes
- Call screen background for all calls, plus a different background for any contact
- Backup and restore of your blocklist, favorites and settings
- Missing permissions card that shows what's still needed and takes you straight to each setting
- Contact us for bug reports and feedback, with device details filled in
- What's new after each update, and a version card with links to the privacy policy and licenses
- Update prompts that let you download the new version straight from GitHub
- Shortcut widget: Lookup, Dial, Recent calls and Contacts in one tap
- Stats widget: Identified calls (Spam, Scam, Safe) and your activity (Votes, Reviews, Lookups)
- Favorites widget: Let's you add up-to 6 contacts you deem most important so you can easily call them through the home screen
- All widgets follow your light and dark theme, and show previews before you add them
- Your contacts, blocklist, favorites, private notes, call history, speed dial and backgrounds stay on your device
- ShieldCall keeps its own short history of the calls it handles. It doesn't read your system call log
- Birthdays are saved in your phone's contacts, so they sync the same way as any other contact field
- When you vote, review or report, the number, your vote, and your review are stored online so other users can see them. Signing in with Google is required for this. Your account ID is stored as an anonymous identifier, and it's never shown to other users
- ShieldCall has no ads and does not sell your data
- You can delete all of your online data at any time from Settings → Delete Account & Data
- Crash reports are sent to Firebase Crashlytics, and you can turn them off in Settings → Privacy
- Emergency calls (112, 911 and similar) work normally, whatever features are turned on
- Download the APK from Releases
- Install it and open ShieldCall
- Grant the permissions the welcome screen asks for:
- Contacts and phone state
- Display over other apps
- Set ShieldCall as your Caller ID & spam app
- Set ShieldCall as your default phone app if you want the full dialer and call screen
- Look up a number, or wait for the next call
The Settings screen shows any permission that is still missing, and takes you straight to it.
Simple and easy!
Yes. ShieldCall is free and open-source, with no ads and no subscriptions.
Contacts let it recognise people you know. Display over other apps lets it show the caller card. The caller ID and phone app roles are how Android lets an app see incoming calls and place its own. Notifications power the missed call and reminder alerts.
No. As a caller ID and spam app, ShieldCall still identifies and blocks calls. Being the default phone app adds the dialer, the call screen, multiple calls, speed dial and the other calling features.
Mostly. Contacts, blocking, call history, your notes, speed dial, birthdays and the missed call strip all work offline. Voting, reviews and community results need an internet connection.
Signing in keeps votes honest by allowing one vote per person on each number. Looking up numbers and receiving call info doesn't require signing in.
Phone numbers don't say whether they belong to a business, so ShieldCall treats toll-free, premium-rate, shared-cost and VoIP numbers as business numbers. It's a best guess and may not be perfect.
Yes. When a call matches your rules or your blocklist, ShieldCall rejects, silences or hangs up on it automatically. This works as long as ShieldCall stays your Caller ID & spam app.
Yes. Go to Settings → Dial → Test call with fake name. You can add a fake caller, a number, and looping audio that plays as if the caller is talking.
Emergency calls always go through. If you're ever unsure, you can switch your default phone app back in Android's settings.
ShieldCall requires Android 10 (API level 29) or higher.
- Feel free to report bugs or give suggestions and feedback by opening an issue or discussion thread!
- You can also send bug reports or feedback in the app: Settings → About → Contact us
The source code is MIT licensed. Firebase and Google services are subject to their own terms. Community votes, reviews and reports are contributed by users and are not covered by the MIT license. See PRIVACY_POLICY.md for how data is handled and THIRD_PARTY_LICENSES.md for the libraries used.