# Skyby vs Underplane

The clearest difference is device support: Skyby at 3 against Underplane's 1. Skyby also leads on iOS requirement (15.0 vs 17.0). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Skyby sells 4 in-app purchases, starting at $2.99 per month and Underplane sells 2 in-app purchases, starting at $5.99 per month. Whichever you choose, the download price is not the number that matters.

Skyby ships an update weekly, Underplane every 5 days. The most recent releases landed on October 31, 2026 and October 29, 2026 respectively.

## The numbers

| Metric | Skyby | Underplane |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (12 ratings)](https://appshunter.io/ios/app/skyby/id6763821459/reviews)** | — |
| Number of ratings | **12** | — |
| Positive reviews | 85.7% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Weekly | **Every 5 days** |
| Monetization | Freemium | — |
| Size | 11 MB | 22 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [StoryForward](https://appshunter.io/developer/509563620) | [David Sebbag](https://appshunter.io/developer/6797931534) |

## What reviewers say

### Skyby

[App page](https://appshunter.io/ios/app/skyby/id6763821459)

Instantly identify commercial flights overhead without searching. Track airline, origin, destination, and aircraft type in real-time. Set alerts for specific planes or monitor your chosen airspace.

**Highlights:** Instant overhead flight identification, Real-time airline, origin, and destination, Aircraft type and altitude display, Inbound flight indicator, Customizable alerts for specific aircraft, Automatic logbook of flights

**Features:** Family Sharing

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Skyby Pro | $2.99 | per month |
| Skyby Pro Annual | $19.99 | per year |
| Skyby Founder Lifetime | $19.99 | one-time |
| Skyby Pro Lifetime | $49.99 | one-time |


### Underplane

[App page](https://appshunter.io/ios/app/underplane-catch-planes-live/id6805019634)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Underplane Pro Monthly | $5.99 | per month |
| Underplane Pro Yearly | $44.99 | per year |


## Frequently asked questions

### Is Skyby free?

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

### Is Underplane free?

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

### Do Skyby or Underplane have ads?

Neither Skyby nor Underplane shows ads.

### Which is updated more often, Skyby or Underplane?

Skyby ships an update weekly, and Underplane every 5 days. Most recently, Skyby was updated on October 31, 2026 and Underplane on October 29, 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.*