# Orbital Defense Protocol vs Retro TD

The clearest difference is price: Retro TD at Free against Orbital Defense Protocol's $0.99. Orbital Defense Protocol's advantage is in-app purchases (none vs 2) and iOS requirement (14.0 vs 17.0). On ads and device support there is nothing between them.

Retro TD is free to download; Orbital Defense Protocol costs $0.99 up front. Retro TD sells 2 one-off in-app purchases. Orbital Defense Protocol asks for nothing beyond the download.

## The numbers

| Metric | Orbital Defense Protocol | Retro TD |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | — | Every 3 days |
| Size | 68 MB | 11 MB |
| Requires iOS | **14.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 9+ |
| Developer | [Carlos Nieto](https://appshunter.io/developer/1896214451) | [Doug Barrett](https://appshunter.io/developer/1527536178) |

## What reviewers say

### Orbital Defense Protocol

[App page](https://appshunter.io/ios/app/orbital-defense-protocol/id6766149607)

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

**In-app purchases:** none


### Retro TD

[App page](https://appshunter.io/ios/app/retro-td/id6770826389)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 4 AI Level Credits | $1.99 | one-time |
| Starter Pack | $2.99 | one-time |


## Frequently asked questions

### Is Orbital Defense Protocol free?

Orbital Defense Protocol costs $0.99, with no in-app purchases.

### Is Retro TD free?

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

### Do Orbital Defense Protocol or Retro TD have ads?

Neither Orbital Defense Protocol nor Retro TD shows ads.

---

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