Missed-call phone verification for Egypt and MENA developers. A secure SMS OTP alternative with REST API, Flutter SDK, and signed webhooks - without Firebase or costly SMS gateways.
Download Karsal on an Android phone and experience missed-call verification firsthand - a real Egyptian app built entirely on Shernova.
Watch the full flow - from signup to verified account in seconds.
Gateway number and label are masked inside the video.
User sees the verification number and taps Call.
The user places a missed ring - the system ends the call instantly.
Verified in under 3 seconds with zero typing.
Production app
Karsal is an innovative marketplace connecting buyers and merchants in Egypt - buyers request products and receive offers from nearby stores, while merchants showcase inventory and reach local customers. Phone verification powered by Shernova - no SMS, no friction.
Try on your phone
Why Shernova
Reliable missed-call verification. Eliminate carrier delays and costly messaging gateway fees.
Average verification under 5 seconds - users never wait for OTP or type anything.
Far lower cost than traditional SMS - pay only for successful verifications.
99.95% uptime with smart gateway routing and automatic failover.
No OTP codes, no carrier delays - one missed call is enough.
How it works
Developers
Flutter SDK and CLI ready to go. Copy, paste, and test your first verification in minutes.
Quick start guide
import 'package:shernova_core/shernova_core.dart';
import 'shernova_config.dart';
await Shernova.init(shernovaConfig);
final session = await Shernova.verify(phoneNumber: '+201012345678');
await for (final update in Shernova.watch(session.sessionId)) {
if (update.status == 'verified') {
// User confirmed - proceed with signup
break;
}
}Pricing
Transparent monthly subscription plans - pay only for successful verifications. Clear pricing built for developers and startups.
Smallest monthly plan for early experiments.
300 verifications / month
For indie developers and early-stage products.
500 verifications / month
For growing products with steady verification volume.
1,500 verifications / month
For high-volume verification at scale.
4,000 verifications / month
Contact us for custom volume and dedicated support for your team.
Volume & integration tailored to you
Real apps powered by Shernova
Production platforms trust us for daily user verification
In production
Buyer-merchant marketplace - instant verification, no SMS
FAQ
The user calls a gateway number shown in your app. Shernova matches the caller and verifies ownership - no SMS OTP code to type or wait for.
Get started
Create a free account, get trial credits, and send your first verification in minutes.
Start for freeContact
Reach our team for support or sales questions.