# Protocol 4 vs Place&Digits

The clearest difference is in-app purchases: Place&Digits at none against Protocol 4's 7. Place&Digits also leads on ads (none vs shown) and iOS requirement (15.1 vs 17.0). On price, update cadence and device support there is nothing between them.

Both are free to download. Protocol 4 sells 7 one-off in-app purchases. Place&Digits asks for nothing beyond the download.

Protocol 4 ships an update every 3 months, Place&Digits every 2 months. The most recent releases landed on October 8, 2026 and October 18, 2026 respectively.

## The numbers

| Metric | Protocol 4 | Place&Digits |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/place-and-digits/id6755953763/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 3 months | **Every 2 months** |
| Monetization | — | Free |
| Size | 12 MB | 33 MB |
| Requires iOS | 17.0 | **15.1** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [HAKAN OZGER](https://appshunter.io/developer/1855495033) | [Abhishek Patel](https://appshunter.io/developer/1857577175) |

## 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 |


### Place&Digits

[App page](https://appshunter.io/ios/app/place-and-digits/id6755953763)

A logic puzzle game where you guess a secret number with unique digits. Receive feedback on correct digits and their positions to deduce the solution. Features multiple difficulty levels and global leaderboards.

**Highlights:** Number guessing puzzle, Unique digit challenges, Place & Digit feedback system, 3 difficulty levels, Global leaderboards, Dark mode

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

**In-app purchases:** none


## Frequently asked questions

### Is Protocol 4 free?

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

### Is Place&Digits free?

Place&Digits is free to download, with no in-app purchases.

### Do Protocol 4 or Place&Digits have ads?

Protocol 4 shows ads; Place&Digits does not.

### Which is updated more often, Protocol 4 or Place&Digits?

Protocol 4 ships an update every 3 months, and Place&Digits every 2 months. Most recently, Protocol 4 was updated on October 8, 2026 and Place&Digits on October 18, 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.*