# Bumpy Birds vs Underwater Runner

The clearest difference is in-app purchases: Underwater Runner at none against Bumpy Birds's 1. Underwater Runner also leads on update cadence (every 4 days vs every 4 months) and iOS requirement (13.0 vs 15.0). On price, ads and device support there is nothing between them.

Both are free to download. Bumpy Birds sells 1 one-off in-app purchase. Underwater Runner asks for nothing beyond the download.

Bumpy Birds ships an update every 4 months, Underwater Runner every 4 days. The most recent releases landed on June 1, 2026 and September 9, 2026 respectively.

## The numbers

| Metric | Bumpy Birds | Underwater Runner |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/bumpy-birds/id883825278/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | Yes |
| Update frequency | Every 4 months | **Every 4 days** |
| Monetization | Free with in-app purchases | — |
| Size | 164 MB | 182 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 9+ | 4+ |
| Developer | [Tapify, Inc.](https://appshunter.io/developer/648965044) | [Ankit Kanani](https://appshunter.io/developer/1800427460) |

## What reviewers say

### Bumpy Birds

[App page](https://appshunter.io/ios/app/bumpy-birds/id883825278)

Tap to make birds fly and ascend as high as possible in this endless arcade game. Avoid obstacles, collect power-ups, and unlock new characters. Compete with friends and share your achievements.

**Highlights:** Simple, endless gameplay, Tap to flap mechanic, Collect golden butterflies for boosts, Unlock new birds, Connect with friends on Facebook, Share achievements on Twitter

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| All Skins | $0.99 | one-time |


### Underwater Runner

[App page](https://appshunter.io/ios/app/underwater-runner/id6742896513)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Bumpy Birds free?

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

### Is Underwater Runner free?

Underwater Runner is free to download, with no in-app purchases.

### Do Bumpy Birds or Underwater Runner have ads?

Both Bumpy Birds and Underwater Runner show ads.

### Which is updated more often, Bumpy Birds or Underwater Runner?

Bumpy Birds ships an update every 4 months, and Underwater Runner every 4 days. Most recently, Bumpy Birds was updated on June 1, 2026 and Underwater Runner on September 9, 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.*