Conditional orders are available on the Sarwa Trade app. They can be placed any time and will only be executed during US trading hours if the target price is reached.
You can cancel a conditional order via the app at any time as long as it is not yet executed in the market. When a conditional order has been executed, the status will change from "Order Pending" to "Executed", and you will be notified by email.
They are available for both stocks and ETF's, and currently only support the buying and selling of whole shares. We are working on providing fractional conditional orders in the near future, stay tuned!