# PROTOCOL vs Project 28

The clearest difference is in-app purchases: Project 28 at none against PROTOCOL's 10. PROTOCOL's advantage is iOS requirement (15.0 vs 17.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. PROTOCOL sells 10 one-off in-app purchases. Project 28 asks for nothing beyond the download.

PROTOCOL ships an update every 3 days, Project 28 every 5 days. The most recent releases landed on October 19, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | PROTOCOL | Project 28 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/project-28/id6793348651/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | Yes | Yes |
| Update frequency | **Every 3 days** | Every 5 days |
| Monetization | — | Free with in-app purchases |
| Size | 258 MB | 637 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 9+ | 12+ |
| Developer | [SungGwon Han](https://appshunter.io/developer/1117887913) | [CRB Labs LLC](https://appshunter.io/developer/1185999013) |

## What reviewers say

### PROTOCOL

[App page](https://appshunter.io/ios/app/protocol-zero-rift/id6740158945)

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

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Beginner Package 1 | $0.99 | one-time |
| Sale Package 3 | $1.99 | one-time |
| Sale Package 1 | $2.99 | one-time |
| Sale Package 2 | $4.99 | one-time |
| Beginner Package 2 | $4.99 | one-time |
| Remove Ad | $5.99 | one-time |
| Daily Special Mission Ticket | $7.99 | one-time |
| Mission Energy Booster (30 Days) | $9.99 | one-time |
| Stage Pass | $9.99 | one-time |
| Beginner Package 3 | $14.99 | one-time |


### Project 28

[App page](https://appshunter.io/ios/app/project-28/id6793348651)

Build and defend a settlement by day, then survive relentless night-time hordes. Manage resources, upgrade defenses, and fight off increasingly difficult bosses in a neon-noir horror world. Experience a challenging, adaptive difficulty curve with no forced waiting.

**Highlights:** Build and defend settlement, Survive endless night hordes, Adaptive difficulty curve, Resource management (power, food, people), Unlockable arsenal of guns, Neon-noir horror aesthetic, One-hand mobile controls

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

**In-app purchases:** none


## Frequently asked questions

### Is PROTOCOL free?

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

### Is Project 28 free?

Project 28 is free to download, with no in-app purchases.

### Do PROTOCOL or Project 28 have ads?

Both PROTOCOL and Project 28 show ads.

### Which is updated more often, PROTOCOL or Project 28?

PROTOCOL ships an update every 3 days, and Project 28 every 5 days. Most recently, PROTOCOL was updated on October 19, 2026 and Project 28 on October 10, 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.*