# Call Blocker vs ESP Alexa

The clearest difference is review sentiment: Call Blocker at 78% against ESP Alexa's 33%. Call Blocker also leads on rating (4.5 vs 2.3) and ratings volume (1.2K vs 3). ESP Alexa'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. ESP Alexa asks for nothing beyond the download.

Call Blocker holds the better App Store score, 4.5 against 2.3. That said, the two scores are not equally well evidenced: Call Blocker has 1.2K ratings behind it against 3, 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 ESP Alexa's.

Call Blocker ships an update monthly, ESP Alexa every 2 months. Both last shipped on October 24, 2026.

## The numbers

| Metric | Call Blocker | ESP Alexa |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (1.2K ratings)](https://appshunter.io/ios/app/call-blocker/id1180310843/reviews)** | [2.3 (3 ratings)](https://appshunter.io/ios/app/esp-alexa/id1464127534/reviews) |
| Number of ratings | **1.2K** | 3 |
| Positive reviews | **78.2% of reviews** | 33.3% of reviews |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Monthly** | Every 2 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 72 MB | 14 MB |
| Requires iOS | 15.6 | **11.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 9+ | 4+ |
| Developer | [UnknownPhone.com](https://appshunter.io/developer/1180310842) | [ESPRESSIF SYSTEMS (SHANGHAI) CO., LTD.](https://appshunter.io/developer/1071176699) |

## 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 |
| Free 1 week trial + 3 months | $9.99 | per 3 months |
| 50% Discount - Three months | $9.99 | per 3 months |
| Three months subscription | $14.99 | per 3 months |
| Free 1 week trial + 3 months | $14.99 | per 3 months |
| Call Blocker: 1 Year | $22.99 | per year |
| Call Blocker: 1 Year - 1 Free Week | $22.99 | per year |
| Call Blocker: 1 Year (50% Discount) | $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


### ESP Alexa

[App page](https://appshunter.io/ios/app/esp-alexa/id1464127534)

This SDK enables developers to integrate Amazon's Alexa Voice Service and Google Voice Assistant into ESP32 microcontroller-based devices. It's designed for evaluating voice assistant integrations in smart speakers and IoT products.

**Highlights:** Alexa Voice Service integration, Google Voice Assistant integration, Dialogflow conversational interface, ESP32 microcontroller support, IoT device integration, Voice assistant evaluation

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Call Blocker free?

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

### Is ESP Alexa free?

ESP Alexa is free to download, with no in-app purchases.

### Which has better reviews, Call Blocker or ESP Alexa?

Call Blocker is rated higher. Call Blocker averages 4.5 out of 5 from 1.2K ratings, while ESP Alexa averages 2.3 from 3 ratings.

### Do Call Blocker or ESP Alexa have ads?

Call Blocker shows ads; ESP Alexa does not.

### Which is updated more often, Call Blocker or ESP Alexa?

Call Blocker ships an update monthly, and ESP Alexa every 2 months. Most recently, Call Blocker was updated on October 24, 2026 and ESP Alexa on October 24, 2026.

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