Like-for-like sales grew by 1.1% on last April, when they had decreased by 3%.
After considering shop price deflation, total sales in April were up 3.3% in real terms.
During the period, total food sales were up by 1.1% and non-food sales increased by 2.6% on a year earlier when they had decreased 2.7%.
Adjusted more comprehensively for the estimated effect of online sales, total Non-Food sales would have increased by 3.2%.
Year-to-date, total Scottish sales growth was 0.7%, which is below the UK total growth and the Scottish 12-month average of 1.5%.
Scottish Retail Consortium director David Lonsdale said retail sales and footfall are both up, and the number of empty retail properties has fallen.
"The strong Footfall data published earlier this week translated into Clothing and footwear turning in the best performance in this category for over three years," Lonsdale added.
KPMG Retail head David McCorquodale said, "April’s bounce back due to a late Easter was more muted than hoped for in Scotland, reminding us how hard retailers are working to drive sales growth in this slowly recovering economy.