SideWRK is a phone-first app for the money side of a trade business. Build an estimate on your phone, send it for approval, and get paid — by card, Venmo, Cash App, Zelle, or Apple Pay, with no merchant account and no per-invoice fee. It covers 30+ trades, from mechanics and appliance repair to cleaning, landscaping, and concrete, with real per-trade pricing built in. Free 14-day trial.