The robocall blocker app market has a lot of options and a lot of marketing claims. Some apps actually deliver. Others are essentially database lookups with a monthly fee attached. And a small number do something fundamentally different from blocking.
This comparison covers the five most widely-used robocall blocker apps in 2026 — including both our own product and our competitors. We'll tell you honestly who each one is best for and where each falls short.
If you want a deeper look at why robocalls are so hard to stop and how call-forwarding protection works, read our guide: How to Stop Robocalls in 2026. This article is focused on comparing specific apps.
Quick Comparison: Best Robocall Blocker Apps
Here's the side-by-side view before we get into the details.
| App | Price | Free tier? | Blocks new numbers? | Wastes scammer time? | Protects legit callers? | Call recording? |
|---|---|---|---|---|---|---|
| RoboKiller | $4.99/mo | No | Partially | Yes (answer bots) | Mostly | Yes |
| Nomorobo | $1.99/mo | No (landline free) | No | No | Yes | No |
| Hiya | Free / $3.99/mo | Yes | No | No | Yes | No |
| Truecaller | Free / $2.99/mo | Yes | No | No | Yes | No |
| YapTrap | $9/mo (free tier) | Yes | Yes | Yes (AI characters) | Yes (Smart Mode) | Yes (scam calls) |
Individual App Reviews
RoboKiller combines a spam number database with "Answer Bots" — pre-recorded audio tracks designed to waste robocallers' time by playing along with their scripts. When a spam call hits, RoboKiller answers with a bot that mimics a confused or easily-distracted person, keeping the caller on the line while you're never bothered.
The database blocks millions of known spam numbers automatically. The answer bot layer catches calls that slip through. It works on mobile (iOS and Android) and integrates with your phone's built-in call screening at the OS level.
Where it falls short: The answer bots are pre-recorded clips, not adaptive AI conversations. Sophisticated scammers can recognize the pattern quickly and hang up. Database coverage varies by region and lags behind new number rotation.
- Established, well-tested product
- Answer bots waste caller time
- Records answer bot calls for your review
- Good database coverage
- No free tier — paid from day one
- Static bots, not dynamic AI
- Misses newly rotated numbers
- Can occasionally flag legitimate callers
Nomorobo is one of the oldest players in the space. It won an FTC prize for robocall innovation back in 2013, and it earned its reputation — the landline version is legitimately free and works well for VoIP-based home phones. For mobile, it costs $1.99/month, making it the cheapest paid option in this comparison.
The mechanism is straightforward: Nomorobo maintains a database of known spam numbers and silently blocks them. Calls from numbers on the list get a single ring and then disappear. Simple, effective for the numbers they've identified.
Where it falls short: Nomorobo is purely database-driven. It has no answer bot, no AI layer, and no mechanism for handling calls from numbers it hasn't seen before. Freshly rotated numbers sail straight through. You're protected against the robocall industry's established players, but not their newest tactics.
- Cheapest paid option at $1.99/mo
- Free landline/VoIP protection
- Simple and reliable
- Long track record
- Database-only, no AI layer
- Misses new spam numbers entirely
- No wasted-time functionality
- Mobile version requires iOS integration
Hiya's primary value is caller identification — it labels incoming calls as likely spam, telemarketer, or scam so you can decide whether to answer. The free version does this reasonably well and is integrated into Samsung phones by default. The premium tier adds automatic blocking, spam call analysis reports, and enhanced caller ID.
Hiya powers the spam-detection layer in several major carrier apps, which gives it a large dataset to draw from. If a number has been flagged by millions of users, Hiya knows about it quickly.
Where it falls short: Labeling is not blocking. The free tier still lets spam calls ring through — it just tells you they're probably spam. And like every database-driven service, freshly rotated numbers bypass detection entirely. Hiya doesn't engage callers or protect against unknown numbers in any active way.
- Free tier is genuinely useful
- Large spam database (powers carrier apps)
- Good caller ID labeling
- Built into Samsung phones
- Free tier labels but doesn't block
- No protection against new numbers
- No active defense or AI interaction
- Premium is limited for the price
Truecaller is the world's most popular caller ID app, dominant in markets like India, Sweden, and across Africa. In the US it functions primarily as a spam-labeling and call-blocking app. Its crowdsourced database — fed by hundreds of millions of users reporting spam numbers — is one of the largest in existence.
The free tier labels and blocks known spam numbers. The premium tier adds a "who called" feature for unknown callers, incognito viewing mode, and premium caller ID. The Android app runs more smoothly than iOS due to Apple's stricter third-party call-handling restrictions.
Where it falls short: The business model involves sharing user data to build caller profiles — worth understanding before you install. On iOS, Truecaller can't automatically block calls the way it can on Android; you have to set it up through your phone's settings. And like the other database apps, it can't handle numbers it hasn't seen before.
- Massive crowdsourced spam database
- Free and globally well-known
- Strong Android integration
- Cheap premium tier
- Data privacy model worth scrutinizing
- iOS functionality more limited
- No active defense against new numbers
- US spam database less comprehensive than global
Try YapTrap Free
Scammers don't just get blocked — they get stuck talking to a confused AI grandpa. Try it free, no credit card needed.
Get Started Free →YapTrap takes a different approach from every other app on this list. Instead of blocking calls or labeling them, YapTrap intercepts them. You forward your unanswered calls to a YapTrap number, and an AI picks up every incoming call before it ever reaches your voicemail.
When an unknown caller connects, YapTrap classifies them in real time. Suspected spam gets routed to Troll Mode: a cast of AI voice characters — Confused Grandpa, Busy Karen, Enthusiastic Intern, and others — that engage the caller in a rambling, circular conversation designed to waste as much of their time as possible. Every minute a scammer spends talking to an AI is a minute they're not calling someone's elderly parent. The conversation is recorded and available in your dashboard — many users find them genuinely entertaining.
Callers who appear legitimate get Smart Mode: a professional AI assistant that asks for the caller's name, reason for calling, and callback number, then sends you a structured summary. You never hear your phone ring for a spam call. You also never miss a real one.
The key technical difference from database-driven apps: YapTrap doesn't need to know a number is bad before handling it. Any unknown number gets screened. Freshly rotated spam numbers, spoofed local numbers, numbers that appear once and never again — all handled the same way. The AI evaluates behavior, not history.
The free tier includes your first three screened calls at no cost. The $9/month Pro plan is the most expensive option in this comparison, which is a real consideration. Whether it's worth it depends on your call volume and how much the "fight back" angle matters to you.
- Handles new and rotated numbers automatically
- Active defense — wastes scammer time
- Never miss a legitimate caller
- Hilarious recordings of trapped scammers
- Free tier to try before paying
- Shareable clips from your dashboard
- Most expensive option at $9/mo
- Requires call forwarding setup
- Calls don't ring your phone directly
- Newer product vs. established competitors
Which Robocall Blocker Should You Choose?
The honest answer is: it depends on what matters most to you. Here's the breakdown by use case.
Clean, simple, does what it says. And it's free for landlines.
Use Hiya on iPhone; Truecaller on Android. Good first layer at no cost.
The only app that traps scammers in AI conversations instead of just hanging up on them.
Good database + answer bots. The established choice if you want time-wasting without the full AI approach.
One thing worth noting: these tools aren't mutually exclusive with your carrier's built-in blocking. AT&T ActiveArmor, T-Mobile Scam Shield, and Verizon Call Filter are all free and catch a lot of obvious spam before it ever reaches any third-party app. Running carrier blocking alongside one of the apps above gives you two independent filters.
If you're still comparing RoboKiller and YapTrap specifically: RoboKiller is more of a traditional app experience — install, subscribe, done. YapTrap requires a call forwarding setup step (about 5 minutes), but in exchange you get protection against every unknown caller, not just those already in a database. For people who get a lot of spam from new numbers, that difference matters.
Frequently Asked Questions
The Bottom Line
Every app on this list is better than nothing. If you're getting hammered with spam calls and doing nothing about it, start anywhere — even the free tier of Hiya or Truecaller will label and block a significant portion.
But if you want a solution that handles calls that slip through any database, never blocks a real caller, and actively makes the scam economy less profitable — the approach is fundamentally different from the database-driven apps. Blocking spam is playing defense. Wasting a scammer's time on a fake AI conversation is something else entirely.
On T-Mobile and seeing a "Scam Likely" caller ID label? See our dedicated guide: How to Block Scam Likely Calls on iPhone & Android.
Stop blocking spam calls. Start trapping them.
YapTrap answers every unknown call with an AI character that keeps scammers talking — and records it for your entertainment. Free to start, no credit card required.
Try YapTrap Free →