rewrite this title Zashi & Your Data

Zashi is a privacy-first wallet, and we take that seriously. That means having access to as little data as possible, and being transparent about the data we have access to, why it matters, and how you can control it. Here’s what you need to know:

What Data We Collect

Zashi does not collect any data. Like most software apps, it uses crash reports, enabled and generated at the operating system level, to help our team detect and fix bugs. But unlike most apps—even those that claim to prioritize privacy—Zashi doesn’t see or collect any other data. Crash reports are the only data we can see, which is rare among app developers.

Crash reports provide limited anonymized technical data the sole purpose of which is to monitor the healthy function of the app. They help make the wallet more stable and usable, nothing more. 

Important:

ECC and the Zashi developers do not track, view, or collect your wallet activity. When a crash report is generated, it offers limited data needed to figure out what triggered the crash. We do not see or collect names, emails, phone numbers, contact lists, user-generated content, or transaction details.

What Crash Report Tools We Use

Crash reports are stored and processed by Google (on Android) and Apple (on iOS), and like all apps on their platforms, we must follow strict rules about what data is collected and how it’s handled. Violating these rules would lead to removal from their stores.

What Crash Reports Do Not Contain

Crash reports are anonymized and only include technical diagnostics like device type, app version, time of the crash, stack trace (which part of the code crashed), error logs, and operating system version. 

These reports do not contain:

Your transaction IDs or history 
Wallet addresses
ZEC balances
Personal information like name, email, or phone
User IDs tied to Zashi
Anything that could link a transaction to a specific user

Crash reports tell us how and when the app broke, not who it happened to.

Can You Opt Out?

Yes, in several ways:

iOS users:

Apple allows users to opt out of diagnostic data sharing across all apps. You can do this in your iPhone settings. iOS does not allow users to opt out for individual apps.

Android users:

Google does not allow developers or users to opt-out from the default Google Play Services data collection for Android Vitals.

To opt out, Android users can download Zashi via F-Droid. The F-Droid version of Zashi is fundamentally different from the Play Store version: it is completely free of proprietary analytics and crash reporting tools.

Improvements:

We already access far less data than most apps, but we’ve taken additional steps to limit data collection even further: 

For iOS, we’ve removed Firebase Crashlytics completely (Zashi iOS v1.5.2). 
We’ve implemented a possibility to opt-out of Firebase Crashlytics for Android. Users can opt out of sharing crash reports in Zashi’s Advanced Settings. (Zashi Android v1.5.2)
For Android, we’ve set Firebase Crashlytics to be “Off” by default. Users can choose to opt in through Zashi’s Advanced Settings or the wallet’s status widget. (Zashi Android v2.0)
We’ve updated the F-Droid version, removing the incorrect security warning, which falsely implied that the F-droid version collects crash reports. That was never the case.

F-Droid & GitHub: Full Transparency

Zashi is available on F-Droid, an independent app store that prioritizes open-source, privacy-respecting software. Unlike traditional app stores, F-Droid does not track or profile users, and it allows for completely anonymous downloads. The F-Droid version of Zashi is fully open-source and includes no crash reporting tools whatsoever. 

The F-Droid Zashi build is completely reproducible, and we encourage our community to build it and verify our work. This helps identify and mitigate potential threats to our infrastructure, processes, and the third-party services we depend on.

You can also build the app yourself from source.

 Zashi code is completely open source and available on GitHub:

Read more about alternative ways to download Zashi wallet.

Philosophy: Privacy by Design

Many wallets claim to prioritize privacy, while quietly collecting analytics and user behavior. Zashi doesn’t just claim it—we live it.

We don’t see or collect user and app data. We don’t profile users. We don’t track their activity. And we go out of our way to minimize metadata leakage. Zashi is built by the same team that created and maintains the Zcash protocol—the most advanced privacy tech in the blockchain industry. We apply the same standards to app development that we do to protocol-level privacy. 

We welcome scrutiny—especially in privacy tech. But conversations about privacy and user safety must be grounded in facts, not fear or speculation. We encourage users to apply the same high standards to all the apps and wallets they use, and to demand transparency and change when those tools fall short.

Our commitment to Zashi users is unwavering.

Shields up.