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Every draw screen also has a Draw button. It produces the same kind of verifiable result, so you never need to shake if you would rather not or cannot.
Each receipt shows a seed fingerprint. Open the round, tap "Verify draw", and the app re-runs the same calculation from the seed and the fixed candidate list. Anyone holding the receipt can compare.
No. Tandalo is a notebook for the circle. Money changes hands between members, outside the app.
Records live only on the device that created them. There is no account and no cloud copy, so a new phone starts empty.
For gold circles the ledger counts grams. The value shown is a reference figure calculated from the price you typed in; update the price to refresh it.