# Spam Zero vs KeepWaves

The clearest difference is rating: KeepWaves at 5.0 against Spam Zero's 4.1. KeepWaves also leads on iOS requirement (15.0 vs 17.2). Spam Zero's advantage is update cadence (every 3 days vs every 19 months) and ratings volume (7 vs 1). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

KeepWaves holds the better App Store score, 5.0 against 4.1. That said, the two scores are not equally well evidenced: Spam Zero has 7 ratings behind it against 1, so its average is the more settled of the two.

Spam Zero ships an update every 3 days, KeepWaves every 19 months. The most recent releases landed on October 7, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | Spam Zero | KeepWaves |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.1 (7 ratings)](https://appshunter.io/ios/app/spam-zero-spam-call-blocker/id6737818516/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/keepwaves/id6742164032/reviews)** |
| Number of ratings | **7** | 1 |
| Positive reviews | 33.3% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 days** | Every 19 months |
| Monetization | Free | Free |
| Size | 12 MB | 15 MB |
| Requires iOS | 17.2 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Kavun, LLC](https://appshunter.io/developer/1503851293) | [Arla Services](https://appshunter.io/developer/1793706092) |

## What reviewers say

### 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


### KeepWaves

[App page](https://appshunter.io/ios/app/keepwaves/id6742164032)

Transform audio recordings into visual art with customizable waveform visualizations. Capture high-quality sound, apply effects, and share your unique acoustic memories as audio, images, or videos. Preserve precious sounds in a way that engages both sight and hearing.

**Highlights:** Customizable waveform visualizations, High-quality audio recording, Real-time visualization, Advanced audio processing, Multiple export options (audio, image, video), Intuitive organization and search, Interactive playback

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

**In-app purchases:** none


## Frequently asked questions

### Is Spam Zero free?

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

### Is KeepWaves free?

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

### Which has better reviews, Spam Zero or KeepWaves?

KeepWaves is rated higher. Spam Zero averages 4.1 out of 5 from 7 ratings, while KeepWaves averages 5.0 from 1 ratings.

### Do Spam Zero or KeepWaves have ads?

Neither Spam Zero nor KeepWaves shows ads.

### Which is updated more often, Spam Zero or KeepWaves?

Spam Zero ships an update every 3 days, and KeepWaves every 19 months. Most recently, Spam Zero was updated on October 7, 2026 and KeepWaves on October 13, 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.*