# Spam Call Blocker by RoboGuard vs Ring Sizer

The clearest difference is ads: Ring Sizer at none against Spam Call Blocker by RoboGuard's shown. Ring Sizer also leads on update cadence (weekly vs monthly). On price, in-app purchases, device support and iOS requirement there is nothing between them.

Both are free to download. Spam Call Blocker by RoboGuard sells 10 in-app purchases, starting at $2.99 per 7 days and Ring Sizer sells 4 in-app purchases, starting at $2.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Spam Call Blocker by RoboGuard ships an update monthly, Ring Sizer weekly. The most recent releases landed on October 23, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Spam Call Blocker by RoboGuard | Ring Sizer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (533 ratings)](https://appshunter.io/ios/app/spam-call-blocker-by-roboguard/id1409438993/reviews)** | — |
| Number of ratings | **533** | — |
| Positive reviews | 33.9% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Monthly | **Weekly** |
| Monetization | Subscription | — |
| Size | 51 MB | 9 MB |
| Requires iOS | **16.0** | 17.0 |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [11259164 Canada Inc](https://appshunter.io/developer/660138248) | [Heinz Meier](https://appshunter.io/developer/1824697405) |

## What reviewers say

### Spam Call Blocker by RoboGuard

[App page](https://appshunter.io/ios/app/spam-call-blocker-by-roboguard/id1409438993)

This app automatically blocks unwanted spam, scam, and robocalls on your iPhone. It protects your privacy by blocking calls directly on your device and offers features like custom block lists, reverse phone lookup, and neighbor spoof protection. Stay protected with continuously updated spam lists and a system that learns from user reports.

**Highlights:** Automatic spam call blocking, Privacy-focused on-device blocking, Customizable block and allow lists, Reverse phone number lookup, Neighbor spoof protection, Continuously updated spam lists, Learns and improves from user reports

**Features:** Family Sharing

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Spam Call Blocker by RoboGuard | $2.99 | per 7 days |
| RoboGuard | $4.99 | per month |
| Spam Call Blocker by RoboGuard | $7.99 | per month |
| RoboGuard - Weekly | $9.99 | per 7 days |
| RoboGuard - Monthly | $9.99 | per month |
| RoboGuard - Yearly | $29.99 | per year |
| Spam Call Blocker by RoboGuard | $39.99 | per year |
| Spam Call Blocker by RoboGuard | $59.99 | per year |
| RoboGuard - Yearly | $89.99 | per year |
| RoboGuard - Yearly | $89.99 | per year |

**What reviewers like**

- 🚀 Effective at blocking spam calls
- 🔒 Provides a sense of security
- 👍 Reduces nuisance calls
- 👍 Works well after initial setup

**What reviewers complain about**

- 🐛 Occasional issues with app stability and updates
- 🔒 Privacy concerns with tracking permissions
- 💰 Expensive subscription model
- 🤔 Inconsistent performance for some users

**Reported bugs**

- App freezes or becomes unresponsive
- Inconsistent call blocking functionality
- Difficulty canceling or managing subscription

**Requested features**

- Improved customer support and communication
- More customization options for call blocking
- Ability to manually add and remove numbers from the blocklist
- Integration with other call blocking services


### Ring Sizer

[App page](https://appshunter.io/ios/app/ring-sizer-ring-size-finder/id6787279321)

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Weekly | $2.99 | per 7 days |
| Pro Monthly | $3.99 | per month |
| Ring Sizer Pro Yearly | $12.99 | per year |
| Ring Sizer Pro Lifetime | $17.99 | one-time |


## Frequently asked questions

### Is Spam Call Blocker by RoboGuard free?

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

### Is Ring Sizer free?

Ring Sizer is free to download, with in-app purchases available.

### Do Spam Call Blocker by RoboGuard or Ring Sizer have ads?

Spam Call Blocker by RoboGuard shows ads; Ring Sizer does not.

### Which is updated more often, Spam Call Blocker by RoboGuard or Ring Sizer?

Spam Call Blocker by RoboGuard ships an update monthly, and Ring Sizer weekly. Most recently, Spam Call Blocker by RoboGuard was updated on October 23, 2026 and Ring Sizer on October 25, 2026.

---

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