# Red Panic Button vs Z

The clearest difference is ads: Z at none against Red Panic Button's shown. Z also leads on update cadence (every 2 weeks vs every 5 weeks). Red Panic Button's advantage is device support (4 vs 2) and iOS requirement (13.0 vs 18.0). On price and in-app purchases there is nothing between them.

Both are free to download. Red Panic Button sells 1 in-app purchase, starting at $0.99 per month and Z sells 4 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Red Panic Button ships an update every 5 weeks, Z every 2 weeks. The most recent releases landed on October 14, 2026 and September 29, 2026 respectively.

## The numbers

| Metric | Red Panic Button | Z |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.5 (17 ratings)](https://appshunter.io/ios/app/red-panic-button/id422029296/reviews)** | — |
| Number of ratings | **17** | — |
| Positive reviews | 29.2% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 5 weeks | **Every 2 weeks** |
| Monetization | Free with in-app purchases | — |
| Size | 63 MB | 10 MB |
| Requires iOS | **13.0** | 18.0 |
| Devices | **iPhone, iPad, iPod, Apple Watch** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [ULTIMATE COMMUNICATION SOFTWARE LTD](https://appshunter.io/developer/422029299) | [Zoltan Homorodi](https://appshunter.io/developer/1583313543) |

## What reviewers say

### Red Panic Button

[App page](https://appshunter.io/ios/app/red-panic-button/id422029296)

This app provides a one-touch solution for emergencies. Upon activation, it sends your location and a customizable alert message via SMS or email to pre-set contacts. It also offers features like voice recording and emergency number dialing.

**Highlights:** Send Panic SMS, Send Panic Email, Record voice message, Customizable alert text, Emergency Number feature, Works with Apple Watch

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Single User Full Version | $0.99 | per month |


### Z

[App page](https://appshunter.io/ios/app/z-calc/id6808435910)

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Fraction Unlock | $0.99 | one-time |
| Units Unlock | $0.99 | one-time |
| Graph Unlock | $0.99 | one-time |
| Quadratic Solver Unlock | $0.99 | one-time |


## Frequently asked questions

### Is Red Panic Button free?

Red Panic Button is free to download, with in-app purchases available.

### Is Z free?

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

### Do Red Panic Button or Z have ads?

Red Panic Button shows ads; Z does not.

### Which is updated more often, Red Panic Button or Z?

Red Panic Button ships an update every 5 weeks, and Z every 2 weeks. Most recently, Red Panic Button was updated on October 14, 2026 and Z on September 29, 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.*