---
title: "Telemetry"
description: "Learn about the different telemetry data, that our SDKs can collect."
url: https://develop.sentry.dev/sdk/telemetry/
---

# Telemetry

* #### [Attachments](https://develop.sentry.dev/sdk/telemetry/attachments.md)

  File attachments associated with events and traces, including screenshots, minidumps, crash reports, and view hierarchies.

* #### [Check-Ins](https://develop.sentry.dev/sdk/telemetry/check-ins.md)

  Cron monitoring protocol for reporting job start, success, and failure via check-in envelopes.

* #### [Client Reports](https://develop.sentry.dev/sdk/telemetry/client-reports.md)

  SDK self-reporting protocol for tracking discarded events and their discard reasons.

* #### [Errors](https://develop.sentry.dev/sdk/telemetry/errors.md)

  Error monitoring — exception capture, wire format, stack trace enrichment, and crash detection.

* #### [Feedback](https://develop.sentry.dev/sdk/telemetry/feedbacks.md)

  Collecting qualitative user input with optional attachments, replay links, and error associations.

* #### [Logs](https://develop.sentry.dev/sdk/telemetry/logs.md)

  Structured logging protocol with severity levels, trace context, and batched envelope delivery.

* #### [Metrics](https://develop.sentry.dev/sdk/telemetry/metrics.md)

  Counter, gauge, and distribution metrics sent as batched trace\_metric envelope items.

* #### [Profiles](https://develop.sentry.dev/sdk/telemetry/profiles.md)

  Stack trace sampling at regular intervals for flamecharts and performance bottleneck analysis.

* #### [Replay](https://develop.sentry.dev/sdk/telemetry/replays.md)

  Session recording protocol for capturing and streaming browser or mobile user sessions to Sentry.

* #### [Sessions](https://develop.sentry.dev/sdk/telemetry/sessions.md)

  Release health tracking via session lifecycle updates and crash-free rate computation.

* #### [Spans](https://develop.sentry.dev/sdk/telemetry/spans.md)

  Span creation, sampling, filtering, and data scrubbing within traces.

* #### [Traces](https://develop.sentry.dev/sdk/telemetry/traces.md)

  Distributed tracing with span trees, sampling, and cross-service trace propagation.

* #### [User Report (Deprecated)](https://develop.sentry.dev/sdk/telemetry/user-reports.md)

  Deprecated user feedback mechanism — use the Feedback spec instead.

## Pages in this section

- [Spans](https://develop.sentry.dev/sdk/telemetry/spans.md)
- [Attachments](https://develop.sentry.dev/sdk/telemetry/attachments.md)
- [Check-Ins](https://develop.sentry.dev/sdk/telemetry/check-ins.md)
- [Client Reports](https://develop.sentry.dev/sdk/telemetry/client-reports.md)
- [Errors](https://develop.sentry.dev/sdk/telemetry/errors.md)
- [Feedback](https://develop.sentry.dev/sdk/telemetry/feedbacks.md)
- [Logs](https://develop.sentry.dev/sdk/telemetry/logs.md)
- [Metrics](https://develop.sentry.dev/sdk/telemetry/metrics.md)
- [Profiles](https://develop.sentry.dev/sdk/telemetry/profiles.md)
- [Replay](https://develop.sentry.dev/sdk/telemetry/replays.md)
- [Sessions](https://develop.sentry.dev/sdk/telemetry/sessions.md)
- [Traces](https://develop.sentry.dev/sdk/telemetry/traces.md)
- [User Report (Deprecated)](https://develop.sentry.dev/sdk/telemetry/user-reports.md)