A monthly membership at BrattySis will cost you $29.98, but not with our deal. For example, if you subscribe monthly via this offer you save $5.00 which lowers your fee to just $24.98 a month. The 12-month plan for $84.00 however is the best deal. If you opt for this yearlong plan you’ll pay an average of $7.00 per month and save yourself 77% instantly.