# PKMap vs ChronoStock Watch Inventory

The clearest difference is in-app purchases: PKMap at none against ChronoStock Watch Inventory's 6. ChronoStock Watch Inventory's advantage is update cadence (every 6 days vs monthly) and iOS requirement (15.1 vs 17.6). On price, ads and device support there is nothing between them.

Both are free to download. ChronoStock Watch Inventory sells 6 in-app purchases, starting at $6.99 per month. PKMap asks for nothing beyond the download.

PKMap ships an update monthly, ChronoStock Watch Inventory every 6 days. The most recent releases landed on October 24, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | PKMap | ChronoStock Watch Inventory |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 75.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Every 6 days** |
| Monetization | Free | — |
| Size | 265 MB | 63 MB |
| Requires iOS | 17.6 | **15.1** |
| Devices | iPhone | **iPhone, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Powerking Chiptuning](https://appshunter.io/developer/1513738417) | [Nicodemo Palmieri](https://appshunter.io/developer/1895407841) |

## What reviewers say

### PKMap

[App page](https://appshunter.io/ios/app/pkmap/id1515877333)

This app allows users to modify and manage PowerKing engine control units via Bluetooth. It intuitively recognizes connected models and offers flexible adjustments to parameters like fuel pressure, turbo pressure, and accelerator pedal response.

**Highlights:** Bluetooth connectivity for PowerKing ECUs, Automatic ECU model recognition, Adjustable fuel pressure, Adjustable turbo pressure, Adjustable accelerator pedal reactivity, Intuitive parameter modification

**Features:** macOS Compatibility

**In-app purchases:** none


### ChronoStock Watch Inventory

[App page](https://appshunter.io/ios/app/chronostock-watch-inventory/id6763630071)

**Features:** macOS Compatibility, Family Sharing

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $6.99 | per month |
| Plus | $11.99 | per month |
| Pro | $17.99 | per month |
| ChronoStock Pro Annual | $69.99 | per year |
| Plus | $99.99 | per year |
| Pro | $149.99 | per year |


## Frequently asked questions

### Is PKMap free?

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

### Is ChronoStock Watch Inventory free?

ChronoStock Watch Inventory is free to download, with in-app purchases available.

### Do PKMap or ChronoStock Watch Inventory have ads?

Neither PKMap nor ChronoStock Watch Inventory shows ads.

### Which is updated more often, PKMap or ChronoStock Watch Inventory?

PKMap ships an update monthly, and ChronoStock Watch Inventory every 6 days. Most recently, PKMap was updated on October 24, 2026 and ChronoStock Watch Inventory on October 15, 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.*