You could use the filters for this call, and then use created_at to select a subset of products.
$complexFilter->complex_filter = array(
'key' => 'CREATED_AT',
'value' => array('key' => 'from', 'value' => '2012-12-17 00:00:00')
'key' => 'created_at',
'value' => array('key' => 'to', 'value' => '2013-01-21 12:02:02')
I took this code from here: https://stackoverflow.com/a/22874035/1016425
You can also filter by other attribute like SKU or Id:
$filters->complexFilter = array(
array( 'key' =>'sku', 'value' => array('lt'=>'03969999')),
array( 'key' => 'sku', 'value' => array('gt'=>'03969000')),
Then you can handle the pagination in the app, of course you would need to know how many products you have and how many products you want to show per page. I don't know of any pagination solution out of the box for soap api.
Also you could use the REST api, or if you want create a controller and an action which takes parameters for pagination and implement it yourself and then return the results in json