# PPKP vs SignalForgeProtocol

The clearest difference is in-app purchases: SignalForgeProtocol at none against PPKP's 3. SignalForgeProtocol also leads on ads (none vs shown). PPKP's advantage is update cadence (monthly vs every 6 months). On price, device support and iOS requirement there is nothing between them.

Both are free to download. PPKP sells 3 one-off in-app purchases. SignalForgeProtocol asks for nothing beyond the download.

PPKP ships an update monthly, SignalForgeProtocol every 6 months. The most recent releases landed on November 3, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | PPKP | SignalForgeProtocol |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (23K ratings)](https://appshunter.io/ios/app/ppkp/id1151287237/reviews)** | — |
| Number of ratings | **23K** | — |
| Positive reviews | 95.2% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Monthly** | Every 6 months |
| Monetization | Free with in-app purchases | — |
| Size | 44 MB | 9 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 9+ | 4+ |
| Developer | [SHIMADA TOSHIHIRO](https://appshunter.io/developer/909988166) | [建川 陈](https://appshunter.io/developer/1885896993) |

## What reviewers say

### PPKP

[App page](https://appshunter.io/ios/app/ppkp/id1151287237)

Become a hero and rebuild a city under attack by monsters. Smash cars for materials, train in martial arts, and upgrade your abilities in the lab to defeat your foes and restore order.

**Highlights:** Smash cars for building materials, Replenish strength and boost combos, Learn martial arts and upgrade dojo, Acquire power-ups and special goggles, Receive hints from city inhabitants

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 100Gem | $0.99 | one-time |
| 600Gem | $4.99 | one-time |
| 6000Gem | $40.99 | one-time |

**What reviewers like**

- ⭐ Simple and fun gameplay
- 🕹️ Satisfying combat system
- 🎨 Charming pixel art style
- 🕰️ Addictive and engaging
- 🔍 Encourages exploration and discovery

**What reviewers complain about**

- 💎 Gems/premium currency hard to obtain
- ⛽ Restrictive energy/gas system
- 🤖 Lack of explanations/tutorials
- 🔁 Repetitive gameplay at later stages

**Reported bugs**

- Occasional button/control responsiveness issues
- Game freezing/crashing on certain levels

**Requested features**

- More ways to earn premium currency
- Ability to save/restore progress across devices
- Additional gameplay modes (boss rush, multiplayer, etc.)
- More customization options for the protagonist


### SignalForgeProtocol

[App page](https://appshunter.io/ios/app/signalforgeprotocol/id6761189304)

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

**In-app purchases:** none


## Frequently asked questions

### Is PPKP free?

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

### Is SignalForgeProtocol free?

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

### Do PPKP or SignalForgeProtocol have ads?

PPKP shows ads; SignalForgeProtocol does not.

### Which is updated more often, PPKP or SignalForgeProtocol?

PPKP ships an update monthly, and SignalForgeProtocol every 6 months. Most recently, PPKP was updated on November 3, 2026 and SignalForgeProtocol on October 28, 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.*