Crash Tracker (iOS)

Keep a record of crashes and compare the days you report with changes in your own activity, stress, and HRV data.

Crashes can differ in when they start, which symptoms appear, and how long it takes to feel better. Recording what came before, what you did afterward, and whether it helped lets you compare episodes without relying on memory. Over time, your entries can help you notice recurring circumstances and give you a clearer record to discuss with your care team.

What came before is context, not proof that an activity caused your crash. The charts cannot predict a crash or identify its cause.

In Crash tracker on Today, choose the day your crash began. Add its start and end times, or select Still ongoing if it hasn’t ended. You can record its severity, symptoms, what came before, what you did afterward, whether it helped, and a note.

What came before gives you a place to record context. Selecting an activity does not mean that activity caused the crash.

Review your entry, then save it to your Journal. You can return to it from the Journal or Your crash log and edit it later. You can record more than one crash on the same day.

Can't find a symptom in More symptoms, or want to specify a medication you took? Write it in Leave a note so it stays with your entry. To request a new tag, open the episode details and tap Give feedback. The crash form does not have a separate medication list, and writing in a note does not automatically add a tag to the catalog.

Your crash log shows the last seven days, including today. Marked days come from the crashes you recorded; the app does not fill them in automatically. The number shows your recorded severity. If you logged several crashes on one day, the log shows the highest severity, while the individual entries remain available.

A baseline is a boundary based on your own previous measurements. It helps distinguish an unusual day from an ordinary variation in your data. It is not a health target: for example, a low activity boundary can be appropriate for someone who is usually less active. A shifted value does not tell you what caused a crash.

For Active Time and Stress Time, Welltory calculates the boundary separately for each day. It looks at the previous 30 calendar days, excluding the day being assessed. A day can contribute to the baseline only when its sleep period is known and there are no more than two hours of missing data while awake. If fewer than 14 reliable days are available, there is no baseline line yet.

With enough history, we find your typical value and its usual variation, then set a boundary beyond that variation. A day with gaps in its data won’t pull your baseline down simply because activity or stress minutes were missed.

Crash tracker shows three measures:

In Changes from your baseline, a small green dot means the measured value is within its range, and a larger white dot means it is shifted. A blank space means there is no value or no reliable comparison. It does not mean the day was in range. The detailed charts below show the available daily values and boundaries.

Look for patterns across several days rather than treating one shifted value as a warning or an explanation for a crash.

You can log crashes, record symptoms and context, add notes, and read or edit your entries for free.

A subscription unlocks the objective measurements, Changes from your baseline, and the detailed charts. If data or enough reliable history are missing, those values and baseline lines may still be unavailable after you subscribe.

Crash Tracker is currently offered in English to new iOS users who reported ME/CFS or chronic fatigue, Long COVID, or POTS during onboarding. If you also reported migraines, you will still see Crash Tracker as your tailored experience. Your onboarding answers help tailor the app; Welltory does not use them to diagnose a condition.