# Critical vs HVZ

The clearest difference is rating: HVZ at 5.0 against Critical's 4.4. HVZ also leads on in-app purchases (none vs 17) and ads (none vs shown). Critical's advantage is ratings volume (125 vs 2). On price, device support and iOS requirement there is nothing between them.

Both are free to download. Critical sells 17 one-off in-app purchases. HVZ asks for nothing beyond the download.

HVZ holds the better App Store score, 5.0 against 4.4. That said, the two scores are not equally well evidenced: Critical has 125 ratings behind it against 2, so its average is the more settled of the two.

Critical ships an update fortnightly, HVZ every 6 days. The most recent releases landed on October 13, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | Critical | HVZ |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.4 (125 ratings)](https://appshunter.io/ios/app/critical-incremental-reactor/id6446354857/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/hvz/id6478895893/reviews)** |
| Number of ratings | **125** | 2 |
| Positive reviews | 18.2% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Fortnightly | **Every 6 days** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 99 MB | 57 MB |
| Requires iOS | **12.0** | 13.4 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 12+ |
| Developer | [WaffleStack Studio LLC](https://appshunter.io/developer/1523413949) | [Jayceb Dhonau](https://appshunter.io/developer/1734322578) |

## What reviewers say

### Critical

[App page](https://appshunter.io/ios/app/critical-incremental-reactor/id6446354857)

Manage a reactor to prevent it from becoming critical by delivering water. Earn money over time to unlock permanent upgrades and improve your survival capabilities. Invest wisely to extend your runs and uncover secrets.

**Highlights:** Reactor management, Incremental income generation, Permanent upgrades, Research and secrets, Survival gameplay

**Features:** macOS Compatibility

**In-app purchases (17)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 100 Gems | $2.99 | one-time |
| 100 Gems | $4.99 | one-time |
| Remove Ads | $7.99 | one-time |
| 225 Gems | $7.99 | one-time |
| Starter Pack | $9.99 | one-time |
| Remove All Ads | $9.99 | one-time |
| 225 Gems | $9.99 | one-time |
| 500 Gems | $9.99 | one-time |
| Pro Pack | $9.99 | one-time |
| Pro Pack | $14.99 | one-time |
| New Player Sale | $14.99 | one-time |
| 500 Gems | $14.99 | one-time |
| 1400 Gems | $19.99 | one-time |
| 800 Gems | $19.99 | one-time |
| 1400 Gems | $29.99 | one-time |
| 3000 Gems | $29.99 | one-time |
| 3000 Gems | $39.99 | one-time |


### HVZ

[App page](https://appshunter.io/ios/app/hvz/id6478895893)

A campus-wide game where players are divided into humans and zombies. Humans defend themselves with Nerf blasters and complete objectives, while zombies tag and infect humans to turn them. Participation requires attending an information session.

**Highlights:** Campus-wide game, Humans vs. Zombies gameplay, Tag and infection mechanics, Nerf blaster defense, Objective-based missions, Teamwork and problem-solving

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Critical free?

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

### Is HVZ free?

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

### Which has better reviews, Critical or HVZ?

HVZ is rated higher. Critical averages 4.4 out of 5 from 125 ratings, while HVZ averages 5.0 from 2 ratings.

### Do Critical or HVZ have ads?

Critical shows ads; HVZ does not.

### Which is updated more often, Critical or HVZ?

Critical ships an update fortnightly, and HVZ every 6 days. Most recently, Critical was updated on October 13, 2026 and HVZ on October 6, 2026.

---

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