Call Blocker vs Spam Zero
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Call Blocker
Block unwanted calls, identify suspicious numbers, and report spam. Access a large community database to avoid phone scams and extra charges. Protect yourself from telemarketers and unknown callers.
- Block any phone number
- Identify commercial calls
- Report suspicious numbers
- Avoid common scams
- Access community database
- Automatic dangerous number blocking
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Protect your iPhone from spam calls with Call Blocker. Enable automatic protection to identify and block calls from numbers on our spam protection list, which we update as new threats are detected. Find out who called you, check suspicious numbers, and take control of unwanted calls. AUTOMATIC SPAM CALL PROTECTION Call Blocker helps protect your phone from unwanted telemarketing calls and potential phone scams. With protection enabled, your iPhone identifies and blocks calls from numbers included in the protection list. Your protection list updates automatically to include newly detected spam numbers. WHO CALLED ME? Look up a phone number before calling back. Check available information from UnknownPhone.com to see whether a number has been associated with telemarketing, unwanted calls, or potential scams, and read other users' reports. BLOCK UNWANTED CALLS Alongside spam protection, add individual numbers to your personal block list. Choose which numbers to block and manage your list in the app. REPORT SUSPICIOUS NUMBERS Received a suspicious call? Report the number and share what happened. Your feedback helps us identify new suspicious numbers and improve our protection. MORE PROTECTION WITH AN OPTIONAL SUBSCRIPTION • Access to the full database of dangerous numbers available for your country. • Automatic updates to your protection list. • Automatic identification and blocking of numbers included in the protection list. • Unlimited credits and unrestricted access to available lookup results. • An ad-free experience. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Spam Zero
Block unwanted spam calls with a vast database of known spammers. This privacy-focused app keeps all blocking data on your device, ensuring your calls and contacts remain private. Enjoy smart protection that distinguishes spam from important calls with an easy setup.
- Block 1M+ known spam numbers
- Complete privacy, no data collection
- Device-only call blocking
- Smart protection for important calls
- Automatic spam database updates
- Real-time call blocking
- Easy setup in minutes
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Tired of endless spam calls? Spam Zero gives you back control of your phone with powerful, privacy-focused call blocking. KEY FEATURES: • Massive Database: Protection from 1,000,000+ known spam numbers • Complete Privacy: We never see your calls or contacts • Device-Only: All data stays securely on your iPhone • Zero Data Collection: We never track or upload your information • Smart Protection: Blocks spam while letting important calls through • Easy Setup: Get protected in minutes PRIVACY FIRST Your privacy is our foundation. Spam Zero is designed with a strict privacy-first approach: • No access to your personal calls or contacts • All blocking happens directly on your device • No data collection or tracking • No cloud storage of your information POWERFUL PROTECTION • Automatic updates to spam number database • Real-time call blocking • Visual status monitoring • Protection status tracking • Simple, intuitive interface GET STARTED Download Spam Zero today and join thousands of users who've taken back control of their phone calls. Setup takes just minutes, and you'll be protected immediately. SUPPORT Need help? Questions? Contact our support team at hey@getspamzero.com Note: Spam Zero requires iOS call blocking permissions to function. Follow the in-app setup guide to enable all features.
Screenshots
Verdict
The clearest difference is review sentiment: Call Blocker at 78% against Spam Zero's 33%. Call Blocker also leads on rating (4.5 vs 3.1) and ratings volume (1.2K vs 18). Spam Zero's advantage is in-app purchases (none vs 10) and ads (none vs shown). On price and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Call Blocker sells 10 in-app purchases, starting at $4.99 per month. Spam Zero asks for nothing beyond the download.
Call Blocker holds the better App Store score, 4.5 against 3.1. That said, the two scores are not equally well evidenced: Call Blocker has 1.2K ratings behind it against 18, so its average is the more settled of the two. Written reviews point the same way: 78% of Call Blocker's written reviews are positive against 33% of Spam Zero's.
Call Blocker ships an update monthly, Spam Zero every 3 days. The most recent releases landed on November 6, 2026 and November 4, 2026 respectively.
| Parameter | Call Blocker | Spam Zero |
|---|---|---|
| Price | Free | Free |
| Rating | 4.5 (1.2K ratings) — better | 3.1 (18 ratings) |
| Positive reviews | 78.2% of reviews — better | 33.3% of reviews |
| Number of ratings | 1.2K — better | 18 |
| Update frequency | Monthly | Every 3 days — better |
| Ads | Yes | No — better |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, iPod | iPhone, iPad |
| Requires iOS | 15.6 — better | 17.2 |
| Further details — not scored | ||
| Size | 72 MB | 12 MB |
| Age rating | 9+ | 4+ |
| Developer | UnknownPhone.com | Kavun, LLC |
Customer experience
Call Blocker
Spam Zero
Bugs and requests
Call Blocker
Reported bugs
2 issues- Database update errors
- Inability to block certain numbers
Requested features
3 requests- Automatic database updates
- Block calls from unknown/private numbers
- Integration with phone's native call blocking
Spam Zero
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Call Blocker
- Call Blocker 1-Month Shield$4.991 Month
- One month subscription$6.991 Month
- Call Blocker: 3M Shield$9.993 Months
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- Call Blocker Premium - 3 Months7 Days trial$9.993 Months
- Call Blocker Premium - 3 Months3 Months trial$9.993 Months
- Three months subscription$14.993 Months
- Call Blocker Premium - 3 Months7 Days trial$14.993 Months
- Call Blocker Premium - 1 Year7 Days trial$22.991 Year
- Call Blocker Premium - 1 Year1 Year trial$22.991 Year
- Call Blocker: 1 Year$22.991 Year
Spam Zero
No in-app purchases









