# Alfa Tech vs Call Shield

The clearest difference is in-app purchases: Alfa Tech at none against Call Shield's 1. Alfa Tech also leads on iOS requirement (16.0 vs 18.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Call Shield sells 1 in-app purchase, starting at $0.99 per month. Alfa Tech asks for nothing beyond the download.

Alfa Tech ships an update monthly, Call Shield every 2 weeks. The most recent releases landed on October 9, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | Alfa Tech | Call Shield |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Every 2 weeks** |
| Size | 65 MB | 17 MB |
| Requires iOS | **16.0** | 18.0 |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Sinapsi](https://appshunter.io/developer/1062396779) | [Orazio Dell'Osa](https://appshunter.io/developer/1886840582) |

## What reviewers say

### Alfa Tech

[App page](https://appshunter.io/ios/app/alfa-tech/id6447767258)

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

**In-app purchases:** none


### Call Shield

[App page](https://appshunter.io/ios/app/call-shield-spam-blocker/id6767889573)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Call Shield Pro Monthly | $0.99 | per month |


## Frequently asked questions

### Is Alfa Tech free?

Alfa Tech is free to download, with no in-app purchases.

### Is Call Shield free?

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

### Do Alfa Tech or Call Shield have ads?

Neither Alfa Tech nor Call Shield shows ads.

### Which is updated more often, Alfa Tech or Call Shield?

Alfa Tech ships an update monthly, and Call Shield every 2 weeks. Most recently, Alfa Tech was updated on October 9, 2026 and Call Shield on October 13, 2026.

---

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