# RedriverBus vs Invaders Quest

The clearest difference is in-app purchases: RedriverBus at none against Invaders Quest's 6. RedriverBus also leads on iOS requirement (15.6 vs 17.6). Invaders Quest's advantage is update cadence (monthly vs every 4 months). On price, ads and device support there is nothing between them.

Both are free to download. Invaders Quest sells 6 in-app purchases, starting at $2.99 per month. RedriverBus asks for nothing beyond the download.

RedriverBus ships an update every 4 months, Invaders Quest monthly. The most recent releases landed on October 1, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | RedriverBus | Invaders Quest |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/invaders-quest-discovery-map/id6737434884/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Monthly** |
| Monetization | — | Free with in-app purchases |
| Size | 125 MB | 27 MB |
| Requires iOS | **15.6** | 17.6 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Cuong Nguyen Cao](https://appshunter.io/developer/1612598774) | [Florian Pygmalion](https://appshunter.io/developer/1713316116) |

## What reviewers say

### RedriverBus

[App page](https://appshunter.io/ios/app/redriverbus/id6443586449)

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

**In-app purchases:** none


### Invaders Quest

[App page](https://appshunter.io/ios/app/invaders-quest-discovery-map/id6737434884)

Discover and track over 4,700 geolocated street art mosaics across 49 cities. Navigate directly to locations, mark your finds, and earn achievements. Works offline and features a retro 8-bit design.

**Highlights:** Interactive map with 4,700+ mosaic locations, Filter by status and city, Track collection progress, Earn coins and unlock achievements, Direct navigation to locations, Offline functionality, Retro 8-bit design

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

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Quest | $2.99 | per month |
| Premium Quest | $3.99 | per 7 days |
| Premium Quest | $3.99 | per month |
| Premium Quest | $7.99 | per month |
| Premium Quest | $19.99 | per year |
| Premium Quest | $39.99 | per year |


## Frequently asked questions

### Is RedriverBus free?

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

### Is Invaders Quest free?

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

### Do RedriverBus or Invaders Quest have ads?

Neither RedriverBus nor Invaders Quest shows ads.

### Which is updated more often, RedriverBus or Invaders Quest?

RedriverBus ships an update every 4 months, and Invaders Quest monthly. Most recently, RedriverBus was updated on October 1, 2026 and Invaders Quest on October 3, 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.*