# Protocol 4 vs PathFill

The clearest difference is update cadence: PathFill at daily against Protocol 4's every 3 months. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Protocol 4 sells 7 one-off in-app purchases and PathFill sells 4 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Protocol 4 ships an update every 3 months, PathFill daily. Both last shipped on October 8, 2026.

## The numbers

| Metric | Protocol 4 | PathFill |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 3 months | **Daily** |
| Size | 12 MB | 20 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [HAKAN OZGER](https://appshunter.io/developer/1855495033) | [Hai-Chou Wang](https://appshunter.io/developer/1789103330) |

## What reviewers say

### Protocol 4

[App page](https://appshunter.io/ios/app/protocol-4-code-breaker-pvp/id6755742805)

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

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pocket Change | $0.99 | one-time |
| Starter Kit | $1.99 | one-time |
| Agent License | $2.99 | one-time |
| Hacker's Stash | $4.99 | one-time |
| Pro Kit | $4.99 | one-time |
| Trust Fund | $9.99 | one-time |
| Master Kit | $9.99 | one-time |


### PathFill

[App page](https://appshunter.io/ios/app/pathfill/id6756887734)

**Features:** macOS Compatibility

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $0.99 | one-time |
| 10 Points | $1.99 | one-time |
| 50 points | $8.99 | one-time |
| 100 points | $15.99 | one-time |


## Frequently asked questions

### Is Protocol 4 free?

Protocol 4 is free to download, with in-app purchases available.

### Is PathFill free?

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

### Do Protocol 4 or PathFill have ads?

Both Protocol 4 and PathFill show ads.

### Which is updated more often, Protocol 4 or PathFill?

Protocol 4 ships an update every 3 months, and PathFill daily. Most recently, Protocol 4 was updated on October 8, 2026 and PathFill on October 8, 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.*