# City Builder Idle vs Space Ducks 2

The clearest difference is in-app purchases: City Builder Idle at none against Space Ducks 2's 4. City Builder Idle also leads on update cadence (daily vs every 3 days) and ratings volume (5 vs 1). Space Ducks 2's advantage is rating (5.0 vs 4.6). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Space Ducks 2 sells 4 one-off in-app purchases. City Builder Idle asks for nothing beyond the download.

Space Ducks 2 holds the better App Store score, 5.0 against 4.6. That said, the two scores are not equally well evidenced: City Builder Idle has 5 ratings behind it against 1, so its average is the more settled of the two.

City Builder Idle ships an update daily, Space Ducks 2 every 3 days. The most recent releases landed on November 9, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | City Builder Idle | Space Ducks 2 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.6 (5 ratings)](https://appshunter.io/ios/app/city-builder-idle/id6757754809/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/space-ducks-2/id6761355927/reviews)** |
| Number of ratings | **5** | 1 |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | **Daily** | Every 3 days |
| Monetization | **Ad-supported** | Free with in-app purchases |
| Size | 31 MB | 118 MB |
| Requires iOS | 15.1 | **14.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [LudoMagus GmbH](https://appshunter.io/developer/1832714895) | [Specktronica LLC](https://appshunter.io/developer/1875097192) |

## What reviewers say

### City Builder Idle

[App page](https://appshunter.io/ios/app/city-builder-idle/id6757754809)

Build a city from a single house to a sprawling metropolis. Earn income, unlock permanent upgrades through prestige, and enjoy strategic gameplay without forced timers or pay-to-win mechanics. Play offline at your own pace.

**Highlights:** Build and expand your city, Earn offline income, Prestige for permanent upgrades, No forced ads or pay-to-win, Strategic building placement, Daily login rewards

**In-app purchases:** none


### Space Ducks 2

[App page](https://appshunter.io/ios/app/space-ducks-2/id6761355927)

Build a vast space empire by growing a duck colony. Tap for resources, launch rockets, mine asteroids, and research technology at your own pace. Enjoy deep progression with stacking upgrades and prestige runs.

**Highlights:** Colony to empire expansion, Deep progression with upgrades, Tech tree research, Multiple visual themes, Offline earnings, Prestige runs

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| DNA Vial - 1K | $4.99 | one-time |
| DNA Beaker - 5K | $9.99 | one-time |
| Stockpile License | $9.99 | one-time |
| DNA Lab - 25K | $19.99 | one-time |


## Frequently asked questions

### Is City Builder Idle free?

City Builder Idle is free to download, with no in-app purchases.

### Is Space Ducks 2 free?

Space Ducks 2 is free to download, with in-app purchases available.

### Which has better reviews, City Builder Idle or Space Ducks 2?

Space Ducks 2 is rated higher. City Builder Idle averages 4.6 out of 5 from 5 ratings, while Space Ducks 2 averages 5.0 from 1 ratings.

### Do City Builder Idle or Space Ducks 2 have ads?

Both City Builder Idle and Space Ducks 2 show ads.

### Which is updated more often, City Builder Idle or Space Ducks 2?

City Builder Idle ships an update daily, and Space Ducks 2 every 3 days. Most recently, City Builder Idle was updated on November 9, 2026 and Space Ducks 2 on October 31, 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.*