# DHC Sync vs Napa LogBook

The clearest difference is update cadence: DHC Sync at every 3 months against Napa LogBook's every 8 months. DHC Sync also leads on iOS requirement (9.0 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.

DHC Sync ships an update every 3 months, Napa LogBook every 8 months. The most recent releases landed on July 7, 2026 and September 18, 2026 respectively.

## The numbers

| Metric | DHC Sync | Napa LogBook |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/dhc-sync/id1130832650/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 8 months |
| Monetization | Free | — |
| Size | 67 MB | 75 MB |
| Requires iOS | **9.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [DHC Specialty Corp.](https://appshunter.io/developer/1130832649) | [NAPA Oy](https://appshunter.io/developer/1540229893) |

## What reviewers say

### DHC Sync

[App page](https://appshunter.io/ios/app/dhc-sync/id1130832650)

This app connects your Bluetooth battery tester to your smartphone or tablet for advanced battery and system testing. It allows you to perform various battery tests, manage test records, and share detailed reports wirelessly. Experience advanced testing technology with easy Bluetooth pairing and data management.

**Highlights:** Perform Battery/System Test, EV Battery Test, Email/text test records, Bluetooth pairing, Detailed test reports, Test data management, Store 2,000+ test records

**Features:** macOS Compatibility

**In-app purchases:** none


### Napa LogBook

[App page](https://appshunter.io/ios/app/napa-logbook/id1438213726)

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

**In-app purchases:** none


## Frequently asked questions

### Is DHC Sync free?

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

### Is Napa LogBook free?

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

### Do DHC Sync or Napa LogBook have ads?

Neither DHC Sync nor Napa LogBook shows ads.

### Which is updated more often, DHC Sync or Napa LogBook?

DHC Sync ships an update every 3 months, and Napa LogBook every 8 months. Most recently, DHC Sync was updated on July 7, 2026 and Napa LogBook on September 18, 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.*