Your phone will need to be on and have an active connection to the outside world for these scheduled messages to be sent. You’re delaying sending the text from your local device, rather than having it wait in the cloud or on a server somewhere, so keep that in mind.
As for third-party chat apps, you won’t find a message schedule in apps like WhatsApp or Signal, but it’s available in Telegram: hold down the Send button (the blue arrow) to find the Schedule a message option, and then choose a date and time to send the message.
Besides scheduling your SMS, you can also delay your emails. Gmail is the best at it, and if you’re using Google’s web-based email client, you can click the little arrow next to the To send button when writing a message, then Schedule the shipment to choose a day and a time.
Gmail will give you suggestions, like tomorrow morning, but if you choose the option Choose the date and time option at the bottom, you can specify exactly when you want the email to be sent. Suggestions for future planning will usually include the last date and time you chose, so you can easily send a bunch of messages at the same time.
Messages waiting to be sent are kept under the Program in the Gmail navigation pane on the left, and until a message is gone, you can open it, edit it, change the scheduled time it should be sent, and delete it.
The emails you have scheduled are stored on Gmail’s servers, so you don’t have to make sure your devices are on and online like you do with scheduled SMS. Once you’ve chosen your date and time, you can turn off your laptop and let Gmail take care of the rest.
These scheduling options are also available in Gmail for Android and iOS. In the mobile apps, in the compose window, you need to tap the three dots in the top right corner and then choose Schedule the shipment: You can then go to one of Gmail’s suggestions or enter a specific date and time.
Apple’s Mail client doesn’t offer a scheduled send feature, but a variety of other email apps do – and you can manage your Apple mail through them (or through Gmail if you prefer).