Allociao
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Allociao is a free Android app that automatically blocks telemarketing calls, robocalls, and phone scams, with no subscription or ads required for the core protection.
Instead of relying on a single crowdsourced blocklist, Allociao combines two data sources: official phone numbering data published by telecom regulators (covering 200+ countries, including satellite and premium-rate prefixes commonly used in wangiri scams) and real-time reports from the Allociao community. Calls from known contacts always ring through, the app never screens people already in your address book.
Beyond call blocking, Allociao includes SMS Guard, an on-device smishing detector that flags suspicious text messages, such as fake delivery notices, fake tax refunds, or bank phishing, using multilingual keyword and pattern analysis, without sending your messages to any server.
For families, Allociao+ (an optional premium tier) extends protection to relatives: a shared blocklist, a family dashboard showing which calls and texts were blocked for each member, and an AI-enhanced detection layer (on-device models) for both calls and SMS that catches more subtle scam patterns, including social-engineering messages with no link, like a stranger pretending to be family with "I changed my number."
Allociao asks for the minimum permissions necessary, avoids restricted Android permissions where possible, and does not require an account to use the free tier. The app is available in 72 languages and covers phone numbering data for 200+ countries.
VoxGuard is an Android call-screening app that protects you from spam calls, robocalls, and unwanted unknown numbers by screening every unknown caller before your phone rings. Instead of relying on spam databases that are always out of date, VoxGuard handles every unknown caller the same way: it intercepts the call, asks the caller to prove they're human, records why they're calling, and lets you decide whether to connect. Your saved contacts always ring through normally, so there are no delays for people you know.
Here's how it works. When an unknown number calls, VoxGuard answers first and asks the caller to repeat a short key phrase of your choice. Robocallers and automated systems can't respond correctly, so they get hung up on automatically after three failed attempts. Real human callers then record a brief reason for their call, which VoxGuard transcribes to text. You receive a push notification with both the audio recording and the written transcript, and you have two minutes to approve the call and have your phone ring, or decline it. Any missed or declined calls go to a smart voicemail with separate greetings for known and unknown callers, and every voicemail is transcribed for you.
VoxGuard works on any carrier and screens every unknown caller, not just numbers on a blocklist. You can customize your key phrase, record your own greetings or use text-to-speech, set the caller's recorded message as your ringtone so you hear who's calling before answering, and toggle screening on or off anytime.
VoxGuard puts you back in control of your phone by making sure only real people, with a real reason to call, ever get through.
7-day free trial, $4.99 per month. Android-only, US-only (iOS and Canada coming soon)
Allociao VoxGuardNo features have been listed yet.
Allociao's answer
Everyday smartphone users tired of telemarketing and scam calls, and families who want to protect relatives (especially older parents) who are common targets of phone scams. The app started in France and is expanding internationally, with phone numbering data covering 200+ countries and a UI in 72 languages.
VoxGuard's answer:
Anyone with a phone. Currently Android-only, US-only. iOS and Canada support coming soon.
Allociao's answer
Allociao was built by a solo developer frustrated with spam calls and unsatisfied with existing call-blocker apps that ask for heavy permissions or upload your address book. The goal was a privacy-respecting alternative that still works well, using public regulator data and community reports instead of harvesting user contacts.
VoxGuard's answer:
The founder wanted to stop his own spam call issue and didn't find a reliable solution. VoxGuard is built for the real-world
Allociao's answer
VoxGuard's answer:
Call Networks, Google Cloud, Azure, Firebase, Kotlin, Jetpack, Asterisk
Allociao's answer
Allociao combines two data sources instead of relying on one: official phone numbering data published by telecom regulators (200+ countries) and real-time community reports. It also detects wangiri/satellite scam prefixes that most call blockers miss, includes an on-device SMS phishing detector (SMS Guard), and its premium tier extends protection to family members with AI-based cross-signal detection between calls and texts. The free tier requires no account and no ads.
VoxGuard's answer:
VoxGuard has a unique 2-phase screening approach. The first is a custom key phrase defined by the user that the caller has to repeat, removing 100% of robocallers. The next is asking for the caller's name and reason for the call, which allows the user to listen or see a transcription of the call. Contacts come through as normal. VoxGuard also offers a custom voicemail seporator for unknown callers vs. contacts, with either voice recording or Text-to-Speech for better anonymity.
Allociao's answer
VoxGuard's answer:
Most services on the market just block calls labeled as spam, with genuine callers being blocked. Others let every call ring through asking for a call reason interrupting your day. With VoxGuard's unique 2-phase screening approach, only verified, real humans ring through.
Allociao's answer
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