Exuvia

Know what your spiders need today

Exuvia records feeding offers, moults, health events and enclosure maintenance - then reads that history back to you as a short daily list.

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Accounts are invite-only while the beta is small.

Why not a spreadsheet?

Plenty of keepers use one, and for storing records a spreadsheet is fine. What it cannot do is notice things. It waits to be asked.

Exuvia's value is the part that watches the history for you. Everything else in the app is bookkeeping.

Two things it watches for

A spider heading into premoult

Tarantulas refuse food routinely, so a single refusal means little. A run of them is the earliest practical sign that a moult is coming. Exuvia counts the run and flags the animal for a closer look.

A spider that must not be fed

After moulting, a tarantula's fangs are soft and live prey can genuinely injure it. Exuvia stops offering that animal food for a species-specific rest period, then puts it back by itself.

Your day, in one screen

2Check prey
1Water
4Feed today
1Watch closely

An illustration, not real records. When all four are clear, you are done for the day.

How the daily loop works

A feeding is an offer, not a meal

  1. You offer prey

    Exuvia records that prey was offered. It does not assume the animal ate, because tarantulas refuse food routinely and healthily.

  2. The next day, you say what happened

    The offer appears under Check Prey so you can remove anything uneaten. A live cricket left in an enclosure can injure a spider that is about to moult.

    Eaten Refused

  3. Refusals are the useful part

    Several refusals in a row are the earliest sign that a moult is coming. The animal appears under Watch Closely - worth a look, not a diagnosis.

After a moult, feeding stops by itself

  1. You record the moult

    Date, leg span if you measured it, and whether you kept the exuvium.

  2. Exuvia stops offering food

    A freshly moulted tarantula has soft fangs and cannot defend itself, so live prey is genuinely dangerous. It moves to Resting After A Moult, showing the date feeding resumes.

  3. It comes back on its own

    Once the rest period for its species has passed, the animal returns to Feed Today. There is nothing for you to switch back on.

Where Exuvia is up to

It is an early beta, used daily by a small number of keepers. It is free to use during the beta. Paid plans are likely later, and anyone using it will be told well before that changes — what they will look like is already written down, including what happens if you stop paying.

Species care values that ship with Exuvia are genus-level starting points, not care sheets, and several are estimates for a whole genus. They are yours to edit. Exuvia will not present a number it cannot stand behind.