Kevin Ford has run some performance tests and reported the results: http://windingroadway.blogspot.co.il/2015/02/mobile-development-platform-performance.html I converted the tests to B4A and B4i. The results are: 1. File size B4A - 112KB B4i (32 bit + 64 bit) - 447KB The tests were made on Nexus 5 and iPhone 5S in Release mode. 2. Load times for both were less than one second. 3. Adding 1000 records. It is a programming mistake to add 1000 records without creating an explicit transaction (as implemented by the blogger). With transactions: B4A - 0.16 s B4i - 0.1 s With no transactions: B4A - 9.5 s B4i - 12 s 4. Reading records to ListView / TableView: B4A - 0.02 s B4i - 0.02 s 5. Writing to a file: B4A - 0.01 s B4i - 0.02 s 6. Reading from a file to ListView / TableView: B4A - 0.01 s B4i - 0.02 s Note that the B4i project uses a new library that wraps the native UITableView (iTableView). It will be released next week. The performance of both B4A and B4i is similar to the performance of native apps.