# Clock Tuner

> Measure beat rate of mechanical watches.

Canonical page: [https://chrome-stats.com/d/com.athumbsoft.pendulumtuner](https://chrome-stats.com/d/com.athumbsoft.pendulumtuner)

## Overview

- **ID:** `com.athumbsoft.pendulumtuner`
- **Platform:** Android
- **Type:** Android app
- **Status:** Removed
- **Publisher:** BuzzSoft
- **Category:** TOOLS
- **Downloads:** 201,379
- **Rating:** 2.93 / 5 (1,812 ratings)
- **Version:** 3.20
- **Last updated:** 2024-05-15
- **First published:** 2013-02-03
- **Size:** 1.99 MB
- **Data as of:** 2025-05-04
- **Store listing:** [Google Play Store](https://play.google.com/store/apps/details?id=com.athumbsoft.pendulumtuner)
- **Website:** [http://www.athumbcut.com](http://www.athumbcut.com/)
- **Privacy policy:** [https://docs.google.com/document/d/1le9shnFAkYr7GLunXU1hnwAFblNMxGFbxzlGx\_R93pQ/edit?usp=sharing](https://docs.google.com/document/d/1le9shnFAkYr7GLunXU1hnwAFblNMxGFbxzlGx_R93pQ/edit?usp=sharing)

## Description

**Clock Tuner** is a specialized timegrapher app designed for mechanical watch enthusiasts and professionals. It measures the beats per hour (BPH) of mechanical watches and displays the time error per day, providing insights into watch accuracy. Utilizing your phone's microphone, it captures the watch's ticking sounds to perform detailed acoustic analysis.

The app features a wave graph and pulse interval histogram in its basic version, while the premium upgrade unlocks frequency display for deeper diagnostics. Clock Tuner recommends using an external microphone connected to your phone, positioned near the back of the watch for best results. It operates best in quiet environments and supports various watch types, including Rolex and pendulum clocks, with customizable sensitivity and sample duration settings.

With practical presets, an informative FAQ section, and ongoing development, Clock Tuner is an essential tool for anyone looking to monitor and tune mechanical watches accurately.

## Permissions and access

### Permissions

- `android.permission.ACCESS_ADSERVICES_AD_ID`
- `android.permission.ACCESS_ADSERVICES_ATTRIBUTION`
- `android.permission.ACCESS_NETWORK_STATE`
- `android.permission.INTERNET`
- `android.permission.RECORD_AUDIO`
- `android.permission.WAKE_LOCK`
- `com.android.vending.BILLING`
- `com.athumbsoft.pendulumtuner.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION`
- `com.google.android.finsky.permission.BIND_GET_INSTALL_REFERRER_SERVICE`
- `com.google.android.gms.permission.AD_ID`

## Review summary

Clock Tuner is praised for its accurate tick detection and ability to finely adjust mechanical watches and clocks using a phone microphone. Users find it easy to use and consider it a cost-effective alternative to professional equipment. However, the trial period is brief, and some experience difficulties with purchasing the pro version or app stability. UI readability and lack of in-app documentation cause confusion, while occasional concerns about error accuracy and support were raised. Overall, it's valued for functionality and price despite some rough edges.

### Pros

- Accurate and reliable detection of watch and clock ticks/bpm with phone microphone.
- Effective for fine-tuning mechanical watches and adjusting clocks with impressive precision.
- Easy to set up and use, with quick results compared to other similar apps.
- Affordable alternative to professional timegrapher machines, offering great value for money.
- Supports custom beat rates and provides useful error and beat error metrics for adjustments.

### Cons

- 30-minute free trial is very limited, requiring purchase to continue usage, and the upgrade process can be problematic.
- UI issues such as tiny font size, lack of zoom or readability for graphs and error displays.
- Limited documentation inside the app explaining terms like beat error, graph interpretations, and settings.
- Occasional stability issues requiring app reinstall or clearing data to restore functionality.
- Some reports of suspicious or fixed error rate increments, causing accuracy concerns and lack of developer support.

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Source: [Chrome-Stats](https://chrome-stats.com/d/com.athumbsoft.pendulumtuner)