Stop using the card now and put it somewhere safe. Deleted or quick-formatted photos usually stay on the card until something overwrites them, so the next hour matters more than the software you choose.
It happens to professionals and to guests: a card formatted by mistake, a folder deleted on the laptop, a card that suddenly says it needs formatting. In each case the photos are usually still on the card.
Data Recovery Pro shows you every photo it can find, at full size, before you pay anything, so you can see what is there before you decide.
The first hour
- Take the card out and stopDon't put it back in the camera, don't format it, don't let the computer "repair" it. Set the camera to a different card.
- Copy nothing to itIf a computer says the card needs formatting or initialising, click Cancel or Ignore.
- Scan it read-onlyData Recovery Pro only reads the card. Photos appear as they are found, each marked intact, partly damaged or not checked.
- Save the photos to a different driveRecover to your computer or an external drive, never back to the card. Keep the card untouched until you have checked the recovered photos.

If the photos were taken on two cards
Many cameras write to two slots. Scan both cards: the second may hold a complete copy, or the RAW files where the first holds JPEGs.
If you're the photographer
Data Recovery Pro runs on your own computer, so your client's photos never touch our servers.
Questions
Should I send the card to a recovery lab instead?
If the card is physically broken, or isn't seen by any computer, yes: that needs a lab. If the computer can see the card, a read-only scan doesn't harm it, and a lab is still an option afterwards.