CronZeno

CronZeno: Sport GPS Tracker and Racing tool

CronZeno is a multi-platform app built by a small team who simply love outdoor sports. We created this tool for anyone dedicated to challenging themselves—be it running, cycling, walking, hiking, skiing, sailing, or swimming—who needs reliable data without the usual hassle.
We are a non-commercial project committed to providing a reliable, free tool for our community. We invite you to join us in building the most trustworthy platform for friendly racing.
We focus on the essentials: empowering you to set up your own tracks, race with friends, and easily track your progress with data you can actually trust.

🤝 Community-Focused Integrity & Privacy

We noticed that existing apps often fall short on integrity and privacy when it comes to club competitions. Our solution is different:

1. Data Integrity You Can Trust (No More "Fake GPX")

We believe your effort deserves verifiable results.

Cryptographic Signature: Every activity file is signed with a Proprietary Hash upon recording. This signature acts as a proof of authenticity, making external file manipulation nearly impossible and guaranteeing your result is certified.

Transparent Accuracy: Lap and sector times are calculated using Geometric LineSectors and Chronometric Interpolation—simple, precise methods that eliminate the guesswork of opaque algorithms.

2. Privacy, Sustainability, and Local Control

We built CronZeno to minimize risk and resource consumption:

Absolute Privacy (Zero Cloud): Your data is stored only on your device. We run no central servers, eliminating the risk of large-scale data breaches. You only share your verified file with the organizer you trust.

Sustainable Computation: All the heavy lifting—hash validation and result calculation—is performed locally on the organizer’s device. We avoid the constant energy drain associated with massive cloud infrastructure.

Offline Ready: Tracking is native. Maps (OpenStreetMap) are cached locally, ensuring reliable data logging and navigation even when you lose signal.

⚙️ Core Features

GPS Tracking for various sports.

Creation of custom tracks with Laps and Sectors (Splits).

Certified timing based on LineSectors.

GPX Doctor tool for visually cleaning up defective GPS data.

Bulk Import of results via shared folders for organizers.

Full data export for in-depth analysis (CSV/PDF).