# Once Upon a Galaxy vs Cost Exchange

The clearest difference is in-app purchases: Cost Exchange at none against Once Upon a Galaxy's 10. Once Upon a Galaxy's advantage is iOS requirement (15.0 vs 17.0). On price, ads and device support there is nothing between them.

Both are free to download. Once Upon a Galaxy sells 9 one-off in-app purchases. Cost Exchange asks for nothing beyond the download.

## The numbers

| Metric | Once Upon a Galaxy | Cost Exchange |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (1.4K ratings)](https://appshunter.io/ios/app/once-upon-a-galaxy/id6504776189/reviews)** | — |
| Number of ratings | **1.4K** | — |
| Positive reviews | 83.4% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Fortnightly | — |
| Monetization | Free with in-app purchases | — |
| Size | 195 MB | 3 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 9+ | 4+ |
| Developer | [Million Dreams Games](https://appshunter.io/developer/1753775797) | [Burhanettin Uludag](https://appshunter.io/developer/1859424804) |

## What reviewers say

### Once Upon a Galaxy

[App page](https://appshunter.io/ios/app/once-upon-a-galaxy/id6504776189)

Embark on a fantasy card battling adventure where you draft unique captains and their friends to complete quests. Choose your path with diverse characters and strategic gameplay. Experience a game free of ads and AI art, focusing on player choice and engaging battles.

**Highlights:** Fantasy card battling, Captain drafting, Quest completion, Strategic gameplay, No AI artwork, Asynchronous play

**Features:** macOS Compatibility, Family Sharing

**In-app purchases (9)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Welcome Bundle | $4.99 | one-time |
| 500 Gems | $4.99 | one-time |
| October 2026 Galaxy Pass | $9.99 | one-time |
| March 2026 Galaxy Pass | $9.99 | one-time |
| December Galaxy Pass | $9.99 | one-time |
| October 2025 Galaxy Pass | $9.99 | one-time |
| September 2025 Galaxy Pass | $9.99 | one-time |
| 1,100 Gems | $9.99 | one-time |
| 2,300 Gems | $19.99 | one-time |

**What reviewers like**

- 🚀 Smooth gameplay
- 👍 Intuitive and streamlined
- 🎨 Charming art style
- 🕹️ Engaging strategy
- ⏱️ Asynchronous play

**What reviewers complain about**

- 🐛 Bugs and crashes
- 🔁 Repetitive gameplay
- 🔒 Locked content behind paywall
- 🤖 Imbalanced heroes/abilities
- 🕰️ Slow progression

**Reported bugs**

- Black screen on startup
- Infinite loading issues
- Progression loss after updates

**Requested features**

- More hero/card variety
- Improved tutorial and learning tools
- Offline/save progress mode
- Cosmetic/non-gameplay monetization
- Competitive/ranked modes


### Cost Exchange

[App page](https://appshunter.io/ios/app/cost-exchange/id6799356746)

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

**In-app purchases:** none


## Frequently asked questions

### Is Once Upon a Galaxy free?

Once Upon a Galaxy is free to download, with in-app purchases available.

### Is Cost Exchange free?

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

### Do Once Upon a Galaxy or Cost Exchange have ads?

Neither Once Upon a Galaxy nor Cost Exchange shows ads.

---

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