This example compares plans that have the same monthly payment:
Plan 1: 12 month contract, 300 inclusive talk minutes, unlimited texts, 500MB data, handset of cost of 199 and free Wi-Fi in certain hotspots that you value at 5 per year. Payment is 36 per month.
Plan 2: 18 month contract, 600 inclusive talk minutes, unlimited texts, 500MB data, no handset cost. Payment is 36 per month.
The App shows that the lifetime costs are similar but the true monthly cost for the 12 month plan are very high compared to the 2nd plan, even though it includes data.