AppaNail carries a 60-day money-back guarantee from the date of purchase.
The guarantee runs for 60 days from purchase and covers dissatisfaction with your results or your overall experience. Given how slowly nails grow, that window may not be long enough to see full results, so consider ordering enough bottles to cover a meaningful stretch of use before deciding.
Contact the official store directly with your order number, within the 60-day window. Some guarantee programmes require unused or empty bottles to be returned; confirm what applies to your order before shipping anything back.