Exact
9881234567One number, either written locally or with country code — both forms are checked.
+91 98812 34567+91 98812 34568
Block theshape✱of spam.
Spam rotates through numbers. Globber doesn't care. Describe the pattern — +1 800 555*, 1900*, *0000 — and Android rejects every match before your phone rings.
CallScreeningService
scroll
01 — the problem
Blocklists want an exact number.
Spam never calls twice from the same one.
Robo-dialers burn through whole ranges — +1 800 555 0101, 0102, 0103… Every call is a "new" number, so a classic blacklist is always one step behind.
Globber flips it: you block the shape. One rule, the entire range — gone.
exact list0rules needed
globber1rule needed
02 — how it works
Screened in milliseconds,
below the ringtone.
☎
Incoming callAndroid hands the caller ID to the system's call-screening role holder — Globber.
fn
Normalize ×2+91 (988) 123-4567 → E.164 +919881234567 and national 9881234567.
✱
First enabled matchRules are tried in your order. Either form matching wins — so local-style and +CC rules both work.
⛔
RespondReject Silence Voicemail — then it's written to the block log.
03 — the lab
Try the real matcher.
This is a line-for-line JavaScript port of RuleMatcher.kt from the app. Type a rule, throw a caller at it.
try:
E.164 caller+911900190000
national caller1900190000
E.164 pattern1900
national pattern1900
✱
BLOCKEDnational form matched
04 — five match types
Five ways to
describe a nuisance.
Starts with
1900The default. Kill premium-rate or telemarketing prefixes in one line.
1900 190 0001900 555 1231800 190 000
Contains
555Any caller ID with this run of digits anywhere inside.
+1 800 555 0101+1 212 867 5309
Ends with
0000Sequential robo-dialers love round tails. They stop here.
+44 7700 900000+44 7700 900001
Regex
^\+447\d{9}$Full regular expressions on the normalized E.164 number, for when you need surgery.
+44 7911 123456+44 20 7946 0958
Then pick an action
- Reject hang up instantly
- Silence let it ring, mutely
- Voicemail send it straight there
+ optional: block withheld / private numbers
05 — the app
Neon-lime bento. Built in Compose.
Block log
Every screened call, grouped by day, with action filters and search.
Backup
Export & import your rules as a JSON file. Yours, portable.
Theming
System, light or dark — with a custom icon set throughout.
Notifications
Optional heads-up whenever something gets blocked.
▶ promo reel · 40s
06 — privacy
100
network permissions.
Globber literally can't phone home.
POST_NOTIFICATIONSoptional · block alerts
Call-screening rolerequired · the whole point
Rules and the block log live in a local Room database on your phone. Nothing else. Read the privacy policy.
07 — get running
Three steps. Then silence.
- 01Download the APK
Grab the signed build from GitHub Releases. Needs Android 10 (API 29) or newer.
- 02Set as call-screening app
Globber asks Android for the call-screening role on first launch. Accept it — that's what lets it reject calls.
- 03Write your first rule
Tap +, type a prefix like
1900. "Starts with" is preselected. Done.
08 — changelog
Shipped, in public.
v1.0.5
National numbers like 9605… now match +91… caller IDs — the matcher compares both E.164 and national forms. Add-rule dialog button fixed. Misleading contacts toggle removed, along with READ_CONTACTS.
v1.0.4
New rules default to Starts with — typing 1900 now blocks the whole prefix out of the box.
v1.0.3
Settings screen: theme switcher, block-unknown-numbers toggle, portrait lock.
v1.0.0 – 1.0.2
Pattern rules, call screening, block log, backup, splash screen and the bento UI.
KotlinJetpack ComposeRoomCallScreeningServiceminSdk 29targetSdk 35MIT
