# Call Blocker vs Spam Zero

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.

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.

## The numbers

| Metric | Call Blocker | Spam Zero |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (1.2K ratings)](https://appshunter.io/ios/app/call-blocker/id1180310843/reviews)** | [3.1 (18 ratings)](https://appshunter.io/ios/app/spam-zero-spam-call-blocker/id6737818516/reviews) |
| Number of ratings | **1.2K** | 18 |
| Positive reviews | **78.2% of reviews** | 33.3% of reviews |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Monthly | **Every 3 days** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 72 MB | 12 MB |
| Requires iOS | **15.6** | 17.2 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 9+ | 4+ |
| Developer | [UnknownPhone.com](https://appshunter.io/developer/1180310842) | [Kavun, LLC](https://appshunter.io/developer/1503851293) |

## What reviewers say

### Call Blocker

[App page](https://appshunter.io/ios/app/call-blocker/id1180310843)

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.

**Highlights:** Block any phone number, Identify commercial calls, Report suspicious numbers, Avoid common scams, Access community database, Automatic dangerous number blocking

**Features:** Vision Pro support

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Call Blocker 1-Month Shield | $4.99 | per month |
| One month subscription | $6.99 | per month |
| Call Blocker: 3M Shield | $9.99 | per 3 months |
| Call Blocker Premium - 3 Months | $9.99 | per 3 months |
| Call Blocker Premium - 3 Months | $9.99 | per 3 months |
| Three months subscription | $14.99 | per 3 months |
| Call Blocker Premium - 3 Months | $14.99 | per 3 months |
| Call Blocker Premium - 1 Year | $22.99 | per year |
| Call Blocker Premium - 1 Year | $22.99 | per year |
| Call Blocker: 1 Year | $22.99 | per year |

**What reviewers like**

- 🚀 Effective call blocker
- 👍 Easy to use
- 🔒 Blocks spam and scam calls
- 💡 Useful caller ID and lookup features

**What reviewers complain about**

- 🐛 Inconsistent performance, some calls still get through
- 🔍 Incomplete database of known scammers
- 💰 Paid version required for full functionality
- 📱 Doesn't integrate well with phone's built-in blocking

**Reported bugs**

- Database update errors
- Inability to block certain numbers

**Requested features**

- Automatic database updates
- Block calls from unknown/private numbers
- Integration with phone's native call blocking


### Spam Zero

[App page](https://appshunter.io/ios/app/spam-zero-spam-call-blocker/id6737818516)

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.

**Highlights:** 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

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Call Blocker free?

Call Blocker is free to download, with in-app purchases available.

### Is Spam Zero free?

Spam Zero is free to download, with no in-app purchases.

### Which has better reviews, Call Blocker or Spam Zero?

Call Blocker is rated higher. Call Blocker averages 4.5 out of 5 from 1.2K ratings, while Spam Zero averages 3.1 from 18 ratings.

### Do Call Blocker or Spam Zero have ads?

Call Blocker shows ads; Spam Zero does not.

### Which is updated more often, Call Blocker or Spam Zero?

Call Blocker ships an update monthly, and Spam Zero every 3 days. Most recently, Call Blocker was updated on November 6, 2026 and Spam Zero on November 4, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*