# Polnav BT bridge vs Watt Map

The clearest difference is update cadence: Polnav BT bridge at every 2 months against Watt Map's every 3 months. Polnav BT bridge also leads on iOS requirement (11.0 vs 15.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Polnav BT bridge ships an update every 2 months, Watt Map every 3 months. The most recent releases landed on October 25, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | Polnav BT bridge | Watt Map |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 3 months |
| Size | 5 MB | 85 MB |
| Requires iOS | **11.0** | 15.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Polstar Technologies Inc.](https://appshunter.io/developer/393264828) | [Ali Hendy](https://appshunter.io/developer/1713551351) |

## What reviewers say

### Polnav BT bridge

[App page](https://appshunter.io/ios/app/polnav-bt-bridge/id1546181174)

**In-app purchases:** none


### Watt Map

[App page](https://appshunter.io/ios/app/watt-map/id6471923827)

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

**In-app purchases:** none


## Frequently asked questions

### Is Polnav BT bridge free?

Polnav BT bridge is free to download, with no in-app purchases.

### Is Watt Map free?

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

### Do Polnav BT bridge or Watt Map have ads?

Neither Polnav BT bridge nor Watt Map shows ads.

### Which is updated more often, Polnav BT bridge or Watt Map?

Polnav BT bridge ships an update every 2 months, and Watt Map every 3 months. Most recently, Polnav BT bridge was updated on October 25, 2026 and Watt Map on October 12, 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.*