# Shellkeep vs Ultrapool

The clearest difference is monetization model: Ultrapool at free against Shellkeep's free with in-app purchases. Ultrapool also leads on chart position (#65 vs unranked) and ratings volume (122 vs 30). Shellkeep's advantage is rating (4.9 vs 4.6) and iOS requirement (15.6 vs 17.0). On price, review sentiment, update cadence and ads there is nothing between them.

Both are free to download. Shellkeep sells 4 one-off in-app purchases and Ultrapool sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Shellkeep holds the better App Store score, 4.9 against 4.6. Both are backed by a comparable volume of ratings — 30 and 122 respectively. Written reviews point the same way: 91% of Shellkeep's written reviews are positive against 85% of Ultrapool's.

Shellkeep ships an update weekly, Ultrapool every 4 days. The most recent releases landed on September 26, 2026 and September 30, 2026 respectively.

## The numbers

| Metric | Shellkeep | Ultrapool |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (30 ratings)](https://appshunter.io/ios/app/shellkeep-card-collector/id6757331713/reviews)** | [4.6 (122 ratings)](https://appshunter.io/ios/app/ultrapool-pool-roguelite/id6769869241/reviews) |
| Number of ratings | 30 | **122** |
| Positive reviews | **90.9% of reviews** | 85.2% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Weekly | **Every 4 days** |
| Monetization | Free with in-app purchases | **Free** |
| Best chart rank | — | **#65** |
| Size | 56 MB | 378 MB |
| Requires iOS | **15.6** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 12+ |
| Developer | [Hamlab AB](https://appshunter.io/developer/1526276751) | [offbrand games](https://appshunter.io/developer/1896695456) |

## What reviewers say

### Shellkeep

[App page](https://appshunter.io/ios/app/shellkeep-card-collector/id6757331713)

Collect, merge, and battle unique cards with thousands of possibilities. Hunt for ultra-rare holographic Shinies and compete with other players in live auctions and club bounties. Build your ultimate collection and test your luck.

**Highlights:** Generate and collect thousands of cards, Hunt for ultra-rare holographic Shinies, Bid, deal, and sell cards, Join clubs to team up with collectors, Compete in live auctions and daily deals, No advertisements

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Quick Gems | $0.99 | one-time |
| Small Gems | $2.99 | one-time |
| Big Gems | $6.99 | one-time |
| Mega Gems | $14.99 | one-time |


### Ultrapool

[App page](https://appshunter.io/ios/app/ultrapool-pool-roguelite/id6769869241)

**Currently charting:** #65 Top Free · Strategy, #75 Top Free · Card, #161 Top Grossing · Card (US App Store)

Experience a unique pool game with roguelite elements and wacky ball effects. Craft strategic builds and pull off incredible trickshots to impress the bartenders. Survive 10 rounds of arcade-style pool with a variety of unique ball abilities.

**Highlights:** Roguelite pool gameplay, Wacky ball abilities, Strategic build crafting, Arcade-style trickshots, 10-round survival mode, Ball combination mechanics

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock Full Game | $5.99 | one-time |


## Frequently asked questions

### Is Shellkeep free?

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

### Is Ultrapool free?

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

### Which has better reviews, Shellkeep or Ultrapool?

Shellkeep is rated higher. Shellkeep averages 4.9 out of 5 from 30 ratings, while Ultrapool averages 4.6 from 122 ratings.

### Do Shellkeep or Ultrapool have ads?

Neither Shellkeep nor Ultrapool shows ads.

### Which is updated more often, Shellkeep or Ultrapool?

Shellkeep ships an update weekly, and Ultrapool every 4 days. Most recently, Shellkeep was updated on September 26, 2026 and Ultrapool on September 30, 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.*