(with real data on which iOS and Android versions people actually use)

TL;DR: TelemetryDeck App Analytics helps developers and product teams understand how their apps are used, without ever collecting personal data. It’s fast, privacy-friendly, based in the EU, and built by developers who deeply care about ethical analytics.

Understanding Your Users – Without Spying on Them

If you’re building an app today, you need to understand how people use it. Which features stick? Where do users drop off? How many are active after day one?

But most analytics tools come with trade-offs. They require user consent banners, raise privacy concerns, or require an army of data scientists to actually get the relevant information out of the data lake.

TelemetryDeck App Analytics takes a different approach: it gives you insights into real app usage while fully protecting user privacy.

(📸 Screenshot: TelemetryDeck Dashboard overview with different charts such as Daily Active Users, User Retention, App Versions, and System Versions)

How is that possible? TelemetryDeck transforms every user’s identifier into a fully anonymized, double-hashed ID before it ever reaches the database servers. The first hash happens on the user’s device, and a second one is applied server-side with a secret salt. This means that it is not possible to reverse the ID or trace it back to an individual person.

Events are collected through TelemetryDeck’s lightweight SDKs for Swift, Kotlin, Flutter, React Native, and more. They contain only the minimal data you specify, never names, emails, IPs, or any unique device information. No cookies. No fingerprinting.

The result: aggregated, anonymous insights that tell you what’s working in your app, without collecting or storing anything personally identifiable.

(📸 Screenshot: examples of a list of latest events that were sent from an app and detailed view of an event with timestamp, user identifier, session identifier, and payload.)

Designed for App Developers

TelemetryDeck was built by and for developers.When co-founders Lisa Figas and Daniel Jilg started the company, they were frustrated by how few analytics tools respected both privacy and developer experience.

Daniel, an experienced iOS developer, wanted clear, honest insights without compromising app performance or user trust. Lisa, coming from product marketing and being an experienced fighter for privacy, envisioned a tool that would make analytics feel ethical, transparent, and empowering.

Today, over 4,000 app publishers use TelemetryDeck App Analytics to guide their decisions, from indie devs to large enterprises in finance, healthcare, and public service.

(📸 Photo: Lisa and Daniel, Co-founders of TelemetryDeck)

The TelemetryDeck Survey: Real-World Device Data for Smarter Decisions

One of the most-loved content pieces published by TelemetryDeck App Analytics is the Orbital Survey, a monthly data report that aggregates anonymized usage information from thousands of apps.

It shows which operating system versions, devices, and screen sizes are most used across real-world iOS and Android users.

(📸 Screenshot: Graph showing iOS version distribution from TelemetryDeck Survey)

For app developers, this means:
• You can decide confidently which OS versions to support
• You know when it’s safe to drop iOS 16 or Android 10 support
• You can optimize testing for the devices that actually matter

👉 Visit TelemetryDeck’s Orbital Survey: iOS and Android Market Share Data (or subscribe to TelemetryDeck’s newsletter to get this data in your inbox every month).

Developers rely on this free public dataset to make informed, data-backed product decisions, without paying for expensive market research or relying on outdated third-party estimates.

What You Can Measure with TelemetryDeck App Analytics

When developers integrate TelemetryDeck App Analytics into their app, two questions almost always come up first.

The main concern is whether there is any drop-off in the onboarding funnel. This moment is critical, because users who have already installed your app represent your highest-value audience. Losing them due to a broken translation, a paywall that appears too early, or an onboarding flow that lacks a clear narrative can be costly. TelemetryDeck makes it easy to understand where onboarding friction happens so you can fix it before it hurts your growth.

(📸 Screenshot: Funnel chart or from TelemetryDeck dashboard)

The second recurring question is which paywall users saw last before they converted to a subscription. Many apps gate multiple features for free users, and product teams want to know which one has the highest conversion power. TelemetryDeck App Analytics gives developers a clear path to discovering which paywall layout, feature lock, or placement performs best, enabling continuous optimization based on real behavior rather than guesswork.

Beyond these core questions, TelemetryDeck provides a broad set of privacy-first insights that help developers understand how their product is performing. You can see which features or screens are used most often to measure feature adoption, track how many users reach your app’s core value to analyze activation, and monitor how many return after one, seven, or thirty days to understand retention. TelemetryDeck also supports A/B testing to compare the impact of design or UX decisions.

All of these insights are delivered without collecting any personal data. You get a complete, privacy-respecting understanding of your product’s performance while staying fully compliant and fully focused on improving your app.

Why Developers Choose TelemetryDeck App Analytics

TelemetryDeck is incredibly fast to integrate. Most teams have it running in under four minutes, which makes it easy to try out between commits or during a coffee break. The lightweight SDK adds almost no overhead, and the first events appear in the dashboard immediately.

They also choose TelemetryDeck because it is trustworthy and privacy-first. There are no dark patterns, no hidden data collection, and no complicated configuration. Developers get clean, reliable analytics that never compromises user experience or legal compliance

(📸 Testimonial: “I highly recommend TelemetryDeck for seeing anonymous users’ behavior patterns. It is affordable for multiple products and provides custom queries for custom dashboards. Plus, it supports watchOS, which Firebase Analytics doesn’t.“)

And finally, they choose TelemetryDeck because it is built by people who care. Lisa and Daniel are accessible, active in the community, and treat indie developers with the same attention as enterprise teams. This human connection is a major reason TelemetryDeck has an incredibly low churn rate.

TelemetryDeck App Analytics is simple to adopt, safe to use, and designed for developers who value speed, clarity, and ethical technology.

Ethical Analytics Are the Future

TelemetryDeck isn’t just another analytics provider; it’s part of a growing movement towards ethical, privacy-first technology.

Most analytics tools rely on tracking personal data like IP addresses, device IDs, or cookies, often sending that information to servers outside the EU where privacy regulations differ enormously from the GDPR. For many app developers, that’s a legal and ethical headache waiting to happen.

TelemetryDeck App Analytics takes a completely different path. All data is processed and stored exclusively within the European Union. Because TelemetryDeck never collects personally identifiable data in the first place, app publishers don’t need consent banners and do not create any privacy grey zones. You get exactly what you need to succeed with your product: clean, compliant insights you can trust.

That’s what Lisa and Daniel set out to build: a world where developers can understand their users, improve their apps, and still sleep well at night, knowing their analytics respect both their users and the law.

Get Started

TelemetryDeck App Analytics is free for small apps and indie developers.
Set up tracking within minutes:
👉 https://telemetrydeck.com

(no credit card required)