Who redefines phone security as an AI-enhanced caller ID platform trusted by 35 million users globally. This app doesn’t just identify unknown numbers—it actively blocks scams, enriches contacts, and provides business directories through its Yellow Pages integration. With a crowd-sourced spam database updated in real time, Who transforms your device into a fortress against unwanted calls while simplifying how you connect.
Features of Who:
🌟 Real-Time Caller ID – Instantly displays names and locations for unrecognized numbers.
🌟 Adaptive Spam Filter – AI learns from 500K+ daily user reports to block emerging threats.
✨ Reverse Lookup Master – Trace phone numbers or emails to uncover hidden identities.
✨ Contact Optimizer – Auto-fill missing details (addresses, alt numbers) in your address book.
💎 Offline Yellow Pages – Access business info without internet—perfect for travelers.
💎 Discreet Background Checks – Explore public records privately via encrypted searches.
Advantages of Who:
Crowd-powered accuracy improves with every spam report submitted by users.
Combines call blocking, business research, and contact management in one tool.
The “Mask Number” feature protects privacy during outgoing calls.
Weekly database updates reflect the latest scam tactics and new business listings.
Disadvantages of Who:
\- Subscription sync errors plague Android users, causing duplicate charges.
\- Rural areas show inconsistent results for landline/email lookups.
\- Battery drain increases by 8–12% when background-check tools are active.
Development Team
Built by TelGuard Solutions, a Barcelona-based collective of telecom engineers and data scientists. Their previous projects include fraud-detection systems for European mobile carriers.
Competitive Edge of Who:
✔ Vs. Truecaller: Who’s offline? Yellow Pages and number-masking tools lack in rival apps.
✔ Vs. Hiya: Larger spam database (12B records vs. 9.3B) but fewer third-party integrations.
Market Performance of Who:
Rated 4.1/5 (Google Play) with 10M+ downloads. Praise centers on robocall blocking, but 22% of reviews cite “laggy updates” and false spam tags on legitimate calls.
Version 21.6 Updates
- Reduced app size by 15% for low-storage devices.
- Fixed bug causing premium users to see ads intermittently.
- Added Swahili and Tagalog language support.
