# Cross Virus vs Build Up!!

The clearest difference is review sentiment: Cross Virus at 100% against Build Up!!'s 34%. Cross Virus also leads on in-app purchases (none vs 1). Build Up!!'s advantage is update cadence (fortnightly vs every 26 months) and ratings volume (16K vs 8). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Build Up!! sells 1 one-off in-app purchase. Cross Virus asks for nothing beyond the download.

Build Up!! holds the better App Store score, 4.5 against 4.3. That said, the two scores are not equally well evidenced: Build Up!! has 16K ratings behind it against 8, so its average is the more settled of the two. Written reviews complicate that: 100% of Cross Virus's written reviews are positive against 34% of Build Up!!'s, so the app with the better star average is not the one people write more warmly about.

Cross Virus ships an update every 26 months, Build Up!! fortnightly. The most recent releases landed on November 1, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | Cross Virus | Build Up!! |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.3 (8 ratings)](https://appshunter.io/ios/app/cross-virus/id944133247/reviews) | **[4.5 (16K ratings)](https://appshunter.io/ios/app/build-up/id1453032346/reviews)** |
| Number of ratings | 8 | **16K** |
| Positive reviews | **100.0% of reviews** | 34.1% of reviews |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 26 months | **Fortnightly** |
| Monetization | **Ad-supported** | Free with in-app purchases |
| Size | 5 MB | 266 MB |
| Requires iOS | **13.0** | 14.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 12+ |
| Developer | [DAN-BALL](https://appshunter.io/developer/348592290) | [Voodoo](https://appshunter.io/developer/714804730) |

## What reviewers say

### Cross Virus

[App page](https://appshunter.io/ios/app/cross-virus/id944133247)

A puzzle game where players strategically place blocks to contain and minimize the growth of viruses. The objective is to limit the spread of viruses by blocking their paths, preventing them from growing uncontrollably.

**Highlights:** Strategic block placement, Virus growth containment, Minimize virus count, Cross-directional virus growth, Touch-based controls

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

**In-app purchases:** none


### Build Up!!

[App page](https://appshunter.io/ios/app/build-up/id1453032346)

Construct your tower as tall as possible by strategically placing building nodes. Collect more nodes as you ascend to reach crucial checkpoints and achieve new heights.

**Highlights:** Build structures high, Gather building nodes, Reach checkpoints, Ascend to new heights

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads. | $2.99 | one-time |

**What reviewers like**

- 👍 Simple and fun game
- 🚀 Runs well with no crashes
- 💰 Free to play

**What reviewers complain about**

- 💸 Excessive ads
- 🐛 Impossible or buggy levels
- 🔁 Repetitive gameplay

**Reported bugs**

- Rivet counter malfunction
- Levels regenerating incorrectly
- Tower physics issues

**Requested features**

- More level variety
- Ability to create custom maps
- Removal of perfect triangle requirement


## Frequently asked questions

### Is Cross Virus free?

Cross Virus is free to download, with no in-app purchases.

### Is Build Up!! free?

Build Up!! is free to download, with in-app purchases available.

### Which has better reviews, Cross Virus or Build Up!!?

Build Up!! is rated higher. Cross Virus averages 4.3 out of 5 from 8 ratings, while Build Up!! averages 4.5 from 16K ratings.

### Do Cross Virus or Build Up!! have ads?

Both Cross Virus and Build Up!! show ads.

### Which is updated more often, Cross Virus or Build Up!!?

Cross Virus ships an update every 26 months, and Build Up!! fortnightly. Most recently, Cross Virus was updated on November 1, 2026 and Build Up!! on November 5, 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.*