CallDam vs PrefixBlock

CallDam is built for mass call blocking by phone-number prefix. Instead of blocking one unwanted number at a time, CallDam lets you create prefix rules that can protect thousands of related numbers at once. The app is designed for large blocking lists, with support for up to 1.8 million active protected numbers. A key feature is direct blocking from the iPhone share flow. When you see an unwanted number or contact, share it to CallDam and create a prefix blocking rule without manually opening the app and rebuilding the rule step by step. Main features: • Block unwanted calls by phone-number prefix • Protect large ranges of related numbers • Support for up to 1.8 million active protected numbers • Add exact-number exceptions for numbers you still want to allow • Pause, resume, edit, or delete rules • Batch-edit multiple rules before applying changes • Add rules directly from the iPhone share sheet • Import and export local JSON backups • Apply your active block list through iOS Call Blocking & Identification Private by design: • No account required • No ads • No subscriptions • No in-app purchases • No tracking • No contact access required • No blocked-number uploads • Your blocking rules stay on your device CallDam prepares your active blocking list locally and applies it through Apple’s iOS Call Blocking & Identification system. Supported prefix-blocking countries and regions: Russia / Kazakhstan (+7), USA / Canada (+1), Armenia (+374), Belarus (+375), Ukraine (+380), Tajikistan (+992), Azerbaijan (+994), Georgia (+995), Kyrgyzstan (+996), Uzbekistan (+998), France (+33), Spain (+34), Poland (+48), Denmark (+45), Norway (+47), Netherlands (+31), Switzerland (+41), India (+91), Iran (+98), Australia (+61), Singapore (+65), Turkey (+90), South Africa (+27), UAE (+971), Saudi Arabia (+966), and Egypt (+20). Important: To block calls, you must enable CallDam manually in iOS Settings: Settings > Apps > Phone > Call Blocking & Identification. CallDam does not collect, upload, sell, or share your blocked numbers.

• 17 languages and 69 countries — block prefixes at home and abroad Chặn Đầu Số identifies and warns you about spam calls and texts by prefix. When a number from a prefix you added calls, the app shows a "Spam" label right on your screen. Other apps only block one number at a time — block this one, they call from the next. Chặn Đầu Số works differently: you block the whole prefix (024899, for example) and the app covers every number starting with it. Spam operations buy numbers in bulk blocks, so blocking by prefix hits them at the source. Key features: • Block calls by landline prefix — 024 (Hanoi), 028 (Ho Chi Minh City) and more • Filter spam SMS from those same prefixes too • Quick-block suggestions for the most common telesales prefixes — one tap • "Warn only" mode — show a label instead of hard-blocking, your choice • Bilingual Vietnamese / English, switch right inside the app Privacy first: • Does NOT read or upload your contacts • NO ads, NO tracking • Your block list stays on your device Free for up to 500,000 numbers. Upgrade to Premium (monthly / yearly / lifetime) to block without limits. Note: iOS handles blocking silently, and it does not block numbers saved in your Contacts. Terms of Use: https://phungdoanh.github.io/term.html Privacy Policy: https://phungdoanh.github.io/privacy_policy.html