Officers from all over the UK have joined in the hunt for the girl after she went missing from the town of Machynlleth, Powys, Mid Wales.
Volunteers from the ambulance service and the Coastguard are also continuing the search.
A spokeswoman for Dyfed Powys Police said: "The area in and around Machynlleth is large and we are continuing to put a huge level of resource into the search.
"As time passes and we work through the detailed plan, we will of course conclude our searches in particular areas.
"Whilst we have almost completed the searches in the town centre area, outside this small vicinity there is still a lot to do.
"The search continues at the same level of intensity that we have seen all last week.
"We have a number of areas and locations identified that require a detailed, methodical forensic search."
Mark Bridger, 46, appeared in court on Wednesday accused of murder and child abduction.
He has also been charged with unlawfully disposing of and concealing April's body with intent to pervert the course of justice.