A smart feeder and camera setup keeps your pet fed on schedule and gives you peace of mind when you are away. A reliable system should easily last four to five years, so focus on solid hardware rather than novelty features. Brands update these gadgets every year, but last year's model usually does the exact same job with the same app support for less money.
Buying both together typically runs about $280. If you time the purchase right and map out the payments, you do not need to drop all that cash at once or pay a single cent in interest.
Keep in mind that an 18-month promotional window is a strict deadline, not free money. If you still carry a balance when those 18 months end, regular interest rates will apply to whatever is left unpaid. Set up your automatic payments, clear the balance on schedule, and you are set.