# CSI Pro vs zero

The clearest difference is ads: CSI Pro at none against zero's shown. CSI Pro also leads on iOS requirement (8.0 vs 15.6). zero's advantage is update cadence (every 2 months vs every 12 months). On price, in-app purchases and device support there is nothing between them.

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

CSI Pro ships an update every 12 months, zero every 2 months. The most recent releases landed on September 16, 2026 and September 21, 2026 respectively.

## The numbers

| Metric | CSI Pro | zero |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.3 (4 ratings)](https://appshunter.io/ios/app/zero-z1/id6479646791/reviews)** |
| Number of ratings | — | **4** |
| Positive reviews | — | 50.0% of reviews |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 12 months | **Every 2 months** |
| Monetization | — | Ad-supported |
| Size | 9 MB | 37 MB |
| Requires iOS | **8.0** | 15.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Gernand van Ee](https://appshunter.io/developer/1511325419) | [Mohammad Alipour Behzadi](https://appshunter.io/developer/1711941412) |

## What reviewers say

### CSI Pro

[App page](https://appshunter.io/ios/app/csi-pro/id1511325420)

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

**In-app purchases:** none


### zero

[App page](https://appshunter.io/ios/app/zero-z1/id6479646791)

Control your burglar alarm remotely via SMS commands. This application simplifies sending instructions to your alarm system without manual text input.

**Highlights:** Remote alarm control, SMS command sending, Multiple location support, Simplified interface, No manual text typing

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

**In-app purchases:** none


## Frequently asked questions

### Is CSI Pro free?

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

### Is zero free?

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

### Do CSI Pro or zero have ads?

zero shows ads; CSI Pro does not.

### Which is updated more often, CSI Pro or zero?

CSI Pro ships an update every 12 months, and zero every 2 months. Most recently, CSI Pro was updated on September 16, 2026 and zero on September 21, 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.*