Text every customer on your list from the number they know.
Upload a spreadsheet, write the message once, and DroidSender sends a personal SMS to every row through your Android phone, with no new number and no fee per message.
- 1,000 SMS free for 30 days
- No card needed
- Cancel anytime
What you can do with campaigns
Everything you need to text a list of customers, from the phone that already has your number.
Send to a whole spreadsheet
Upload an Excel or CSV file with up to 50,000 rows, and every row becomes a message to that customer.
Personalise every message
Any column in your file can go into the text, so each customer reads their own name, date or amount.
Catch bad numbers first
Invalid, empty and repeated numbers are listed before anything is sent, so no one is skipped without you knowing.
Schedule it for later
Pick the day and the hour, and the campaign starts on its own from your phone.
Pause, edit and carry on
Pause a campaign at any time to fix the text, and the new version goes to everyone who has not received it yet.
Opt-outs handled for you
When a customer replies STOP, they get one confirmation and are left out of every future campaign.
How a campaign goes out
Three steps in the dashboard, and your Android phone does the sending.
Upload your file
Excel or CSV, up to 50,000 rows. The phone column is found for you, and numbers are put in international format.
Write the message once
Write a plain message for everyone, or type @ to add a column from your file so each customer gets their own name or date.
DroidSender shows how many SMS each message uses on your mobile plan while you write. Keep it between 1 and 5 SMS for the best delivery. How SMS length works
Send now or schedule it
The campaign goes out from your phone at a steady pace and you watch every message counted as it leaves.
Send at the right time, at the right pace
Control how fast, when and how much each campaign sends, so it stays inside your mobile plan.
Choose the speed
Automatic by default, or Careful (about 180 an hour), Very careful (60 an hour) or your own pace from 10 to 600 messages an hour. You can change it during the campaign.
Send only at set hours
Messages go out only within the hours you choose, for example 9:00 to 19:00, in your account's time zone.
Pick the days
Choose the days of the week the campaign can send, for example Monday to Friday.
Set a daily limit
Cap how many messages go out each day. The campaign stops at the limit and carries on by itself the next day until the list is done.
Worried about your carrier? See how to avoid limits on your number.
Who sends reminders with DroidSender
SMS appointment reminders for tradespeople
Text every customer their visit day and time from your own phone and number, and answer replies from your computer. For plumbers, electricians and engineers.
SMS appointment reminders for clinics
Send patients a reminder with their name and time from your clinic's own number, and handle confirmations and cancellations in one inbox.
SMS reminders and messages for salons
Remind clients of their appointment from your salon's own number, fill cancellations, and answer every reply from your computer.
Appointment reminders
- Rate
- 42/min
- Remaining
- 395
- Expected end
- –
- Failed
- 3
Why send campaigns from your own number
Customers know who is writing
Messages go out through the SIM card in your phone and arrive from the number your customers already have saved, so they open them and reply to you.
It keeps going without you
Once a campaign starts, it runs from our servers through your phone, even after you close the computer. If the phone loses signal, the messages wait and carry on when it is back.
You see what happened to every message
The campaign shows what has been sent, what failed and when it should finish. Each failure comes with a plain reason, and the ones that can be retried can be sent again.
Questions about campaigns
Still not sure? Ask the assistant on this page or book a call with us.
Book a callLast updated
Which files can I upload?
Excel (.xlsx and .xls) and CSV files, up to 10 MB and 50,000 rows. DroidSender finds the column with the phone numbers, and you can pick a different one if it guessed wrong.
How do I put each customer's name in the message?
Type @ in the message and choose a column from your file, for example @name. Each customer gets the value from their own row.
Do I need to keep the computer on?
No. Once a campaign starts it keeps sending from your phone after you close the browser. The phone needs to stay on and with signal, and if it goes offline the messages wait until it is back.
How long can one SMS be?
160 characters of plain text, or 70 when the message has emoji or some accented letters. Longer messages are split into parts, and the editor counts them as you type and points out the characters that make a message longer.
What happens when someone replies STOP?
They receive one confirmation, and their number is left out of every future campaign on your account. Replying START brings them back.
Start today, with your own number.
Connect your Android phone to send campaigns and answer customers from your computer. Your customers keep reaching you on the number they know.
Try it free: 1,000 SMS in your first 30 days, then 100 a month. No card needed.
