Chapter 21: Usage Stats & Device Diagnostics — see your spending and check your phone
This chapter covers two "viewing" features: ① usage statistics (your AI spending); ② device diagnostics (a health check for your phone).
Reading time: about 10 minutes.
21.1 What is "usage statistics"? — see where your money goes
Talking to AI is billed by "tokens" (think of a token as a rough "word unit"). Usage statistics help you see exactly what each cent was spent on:
- Dimensions: conversation count, message count, your input tokens, AI output tokens;
- Even the AI's thinking (chain-of-thought), tool calls, file reads, command output and repeated context count;
- Offline estimation: no network, no data sent to third parties, pure local calculation;
- Views by day / week / month / year / total / custom range.
Enter via the stats page in the sidebar, which shows your token, conversation and model usage in this app.
21.2 What is usage statistics good for?
- Cost analysis: compare which model/prompt costs more, optimize your choice;
- Find the "eater": see how much of the token budget went to tool calls and file reads in Agent tasks — if a task burns a lot, it's usually context bloat (e.g. asking the AI to re-read huge files repeatedly); optimize your prompts.
For beginners
No need to check daily. Look at it when you have cost anxiety or want to compare models.
How do I clear the statistics?
Uninstall and reinstall! Remember to back up your data first (see Chapter 20).
21.3 Device diagnostics: a health check for your phone
Lyra Code can read your phone's information for troubleshooting:
| Feature | What you see | When to use |
|---|---|---|
| Phone info page | Brand, model, Android version, CPU, memory, storage, screen, network, Bluetooth, battery | Curious about your phone's specs |
| Hardware check Agent | AI analyzes your phone info, diagnoses issues, compares hardware | Phone acting up — ask "what's wrong with my device?" |
| App list | Installed apps (package name, version, signature) | Find a specific app's full package name |
Note
These are for troubleshooting and reasonable inference, not absolute proof of device authenticity. For deeper system-level diagnosis, pair with Shizuku's dumpsys / pm commands (see Chapter 13).
21.4 Logs
- The logs page shows the execution status of some commands;
- Normally there's no need to look at it — just clear it occasionally.
21.5 Beginner FAQ
Q: Are the usage numbers accurate? A: They're local estimates; there may be small differences from the provider's bill, but they're good enough for comparison and trend monitoring.
Q: Will diagnostics leak my privacy? A: These are only read when you ask the AI to analyze; they stay local and are never uploaded automatically.
End of chapter · Next: Security Practices — use it safely