# Pemp VTC vs Stacky

The clearest difference is in-app purchases: Pemp VTC at none against Stacky's 3. Pemp VTC also leads on iOS requirement (13.0 vs 16.0). Stacky's advantage is update cadence (every 4 days vs every 2 weeks). On price, ads and device support there is nothing between them.

Both are free to download. Stacky sells 3 in-app purchases, starting at $8.99 per month. Pemp VTC asks for nothing beyond the download.

Pemp VTC ships an update every 2 weeks, Stacky every 4 days. The most recent releases landed on October 15, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | Pemp VTC | Stacky |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 weeks | **Every 4 days** |
| Size | 77 MB | 47 MB |
| Requires iOS | **13.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Mon Appli VTC](https://appshunter.io/developer/1437377960) | [Stacky Technologies](https://appshunter.io/developer/6778837622) |

## What reviewers say

### Pemp VTC

[App page](https://appshunter.io/ios/app/pemp-vtc/id6479007399)

**Features:** macOS Compatibility, Apple Wallet

**In-app purchases:** none


### Stacky

[App page](https://appshunter.io/ios/app/stacky-flight-tracker-and-trips/id6778837620)

**Features:** macOS Compatibility, Apple Watch app

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Stacky Premium | $8.99 | per month |
| Stacky Premium | $69.99 | per year |
| Trip Pass | $6.99 | one-time |


## Frequently asked questions

### Is Pemp VTC free?

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

### Is Stacky free?

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

### Do Pemp VTC or Stacky have ads?

Neither Pemp VTC nor Stacky shows ads.

### Which is updated more often, Pemp VTC or Stacky?

Pemp VTC ships an update every 2 weeks, and Stacky every 4 days. Most recently, Pemp VTC was updated on October 15, 2026 and Stacky on October 13, 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.*