The Protect Scotland app has already told more than 100 Scots to self-isolate, Nicola Sturgeon revealed.
Second day of exactly 267 new infections which amounts to 3.6% of newly-tested Scots.
The SQA plans to run a full diet of exams next spring but is preparing contingencies, John Swinney said.
Nicola Sturgeon said the measures in five council areas are 'helping to slow down the increase' in cases.
One person with Covid-19 has died in the last 24 hours, while Scotland has logged the most daily infections since May 6.
The First Minister said there were 'serious concerns' over a growing number of unfinished tests.
People living in North and South Lanarkshire will no longer be able to host or visit other households.
Nicola Sturgeon said rising cases in the Lanarkshire region are of 'particular concern' to the government.
Holidaymakers coming back Hungary and La Réunion will have to self-isolate from 4am on Saturday.
Nicola Sturgeon said there are 161 new cases of coronavirus in Scotland, 1.9% of newly-tested people.
From April to June, total deaths in Scotland were around a third higher than usual - around 4500 excess deaths.
There is some Covid-19 transmission in the city's hospitality sector, the First Minister said.
It is the first time there have been three deaths reported in a day since June 30, with 176 new cases.
Indoor household gatherings banned in two more council areas and extended in another three.
Scotland's 146 new cases amount to 2.4% of all newly-tested individuals.
UK transport secretary Grant Shapps made the claim but the Scottish Government defended its decision.
Total Covid-19 cases in Scotland over the course of the pandemic are now more than 21,000.
Holidaymakers to the southern European nation will have to isolate for 14 days when they return.
It means new Covid-19 cases in the country have been above 100 for five days in a row.
There are 156 new Covid-19 infections in Scotland with more than half in the Greater Glasgow and Clyde area.