# RPD vs air

The clearest difference is price: RPD at Free against air's $4.99. RPD also leads on rating (5.0 vs 4.5) and update cadence (every 9 days vs every 9 months). air's advantage is ads (none vs shown) and review sentiment (89% vs 80%). On in-app purchases, device support and iOS requirement there is nothing between them.

RPD is free to download; air costs $4.99 up front. RPD sells 6 one-off in-app purchases and air sells 3 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

RPD holds the better App Store score, 5.0 against 4.5. Both are backed by a comparable volume of ratings — 4 and 19 respectively. Written reviews complicate that: 80% of RPD's written reviews are positive against 89% of air's, so the app with the better star average is not the one people write more warmly about.

RPD ships an update every 9 days, air every 9 months. The most recent releases landed on October 11, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | RPD | air |
| --- | --- | --- |
| Price | **Free** | $4.99 |
| Rating | **[5.0 (4 ratings)](https://appshunter.io/ios/app/rpd-random-pixel-td/id1546590736/reviews)** | [4.5 (19 ratings)](https://appshunter.io/ios/app/air-star/id6445810380/reviews) |
| Number of ratings | 4 | **19** |
| Positive reviews | 79.6% of reviews | **88.9% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | **Every 9 days** | Every 9 months |
| Monetization | **Free with in-app purchases** | Paid |
| Size | 114 MB | 75 MB |
| Requires iOS | 13.0 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Sunghyun Park](https://appshunter.io/developer/1546590738) | [Brendan Roarty](https://appshunter.io/developer/1673920112) |

## What reviewers say

### RPD

[App page](https://appshunter.io/ios/app/rpd-random-pixel-td/id1546590736)

A pixel art tower defense game where you combine shapes to level up your defenses and defeat waves of enemies. Test your luck and strategy to survive and earn rewards.

**Highlights:** Combine shapes to level up, Defeat enemies for gold, Upgrade defense colors, Receive round breakthrough rewards, Strategic placement of defenses

**Features:** macOS Compatibility

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| RPD 3x Speed | $0.49 | one-time |
| RPD Remove Ads | $0.49 | one-time |
| RPD Skip Button | $0.99 | one-time |
| RPD 100,000 kills | $2.99 | one-time |
| RPD 100,000kills | $2.99 | one-time |
| RPD 100,000 kills | $3.99 | one-time |


### air

[App page](https://appshunter.io/ios/app/air-star/id6445810380)

Defend against incoming luggage as a frog in this tower defense game. Purchase upgrades for towers and health to progress further. Customize your character with unlockable outfits and hats.

**Highlights:** 70+ unique upgrades, Ultimate Upgrades for endgame, 7 unlockable levels, Character customization (hats, skins), Unique achievements

**Features:** Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Retry Tokens | $0.99 | one-time |
| Star Stack | $0.99 | one-time |
| Star Bundle | $1.99 | one-time |


## Frequently asked questions

### Is RPD free?

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

### Is air free?

air costs $4.99, and also offers in-app purchases.

### Which has better reviews, RPD or air?

RPD is rated higher. RPD averages 5.0 out of 5 from 4 ratings, while air averages 4.5 from 19 ratings.

### Do RPD or air have ads?

RPD shows ads; air does not.

### Which is updated more often, RPD or air?

RPD ships an update every 9 days, and air every 9 months. Most recently, RPD was updated on October 11, 2026 and air on October 7, 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.*