Your numbers, calls, and
messages — one app.
Buy virtual phone numbers from countries around the world, send and receive SMS, and make crystal-clear voice calls. Decibell unifies every conversation across providers under a single inbox.
Everything a modern phone needs — without the contract
Decibell turns one app into a multi-number, multi-country phone hub. Pick a number from any supported country, and use it just like a SIM — for SMS, calls, MMS, and threaded conversations.
SMS Messaging
Send and receive text messages with delivery and read receipts.
Voice Calls
Crystal-clear VoIP calls with native CallKit on iOS — incoming calls ring like a regular phone.
Multiple Numbers
Own as many numbers as you need — separate work, side projects, and personal in one inbox.
Multiple Countries
Buy a US, UK, German, or Turkish number in seconds — no SIM swap, no roaming.
Threaded Inbox
Every number, every contact — organized into clean conversations with pin, archive, and unread badges.
Contacts
Save your own address book inside the app or sync from your device.
Built like a telecom carrier, priced like an app
Real-time delivery status, push notifications when you're offline, and a clean conversation UI you'll actually want to use.
Buy Numbers Instantly
Search available numbers by country and area code, then provision in seconds. The app shows you the best provider for each country automatically.
SMS in & out
Send a text from any of your numbers. Replies show up as a threaded conversation with delivery, sent, and read states.
VoIP Voice Calls
Initiate or receive voice calls over IP using native provider SDKs with low-latency audio.
MMS & Media
Receive images, GIFs, and other media inline in a conversation. Tap to view full-screen or share.
Conversation Inbox
Every number you own gets its own thread per contact. Pin the important ones, archive the noise.
Country Coverage
Pick from a growing catalog of countries — flagged, searchable, and filtered by what's actually available right now.
Multi-Provider Routing
Decibell routes each number to the best provider for that country and falls back automatically if one is down — you just see a working number.
Real-Time Delivery Status
See pending → sent → delivered → failed for every outbound message, in real time, with reasons when something fails.
Push Notifications
Stay reachable even when the app is closed. New messages and missed calls arrive as native push notifications.
Native iOS CallKit
Incoming calls ring with the system UI — accept, decline, mute, or send to voicemail like any other call.
Personal Address Book
Save the people you actually talk to. Names, numbers, emails — all kept inside the app for quick access.
Block Unwanted Numbers
Block any number from reaching any of your phone numbers. Spam stops where you set the line.
VoIP Push Reliability
Calls use APNs VoIP push (PushKit) so the system wakes Decibell instantly — no missed rings.
Call History
Browse every inbound and outbound call with duration, status, and contact — and tap to call back.
Pin & Archive
Promote important threads to the top, hide finished ones — your inbox stays clean as you grow.
Encrypted in Transit
Every message and signaling event between you, Decibell, and the carrier travels over TLS. We don't read your messages.
Synced Across Devices
Sign in on a new device and your numbers, conversations, and contacts come with you instantly.
From install to first message in 60 seconds
No SIM, no contract, no porting. Open the app, pick a number, and you're online.
Create your account
Sign up in the iOS app with email or phone. Decibell creates your inbox and grants the permissions you choose to allow.
Pick a number
Search by country, browse what's available right now, and provision a virtual number through the best telecom provider for that region.
Send, call, repeat
Start a conversation, place a voice call, share media — everything lands in your unified inbox with real-time delivery.
Ready to consolidate every number you carry?
Stop juggling SIMs, second-line apps, and burner numbers. Decibell gives you one inbox for SMS and voice, across countries and providers — try it free.