Typically, an IRA is not a suitable replacement for a savings account, as you usually incur penalties for withdrawing money before the IRA matures. Money put in an IRA is essentially "forgotten" about, as it grows tax-free and awaits withdrawal in 40 years. The benefit is that you get to invest in stocks/funds in a tax-sheltered manner whether you choose a Traditional or Roth IRA.
A better option that more closely mimics a savings account is a Money Market account...slightly higher yield than savings, sometimes with check-writing privileges. Most brokerages have these available.
If you have a little bit longer time horizon (at least 3 years, preferably more) and a little more money, consider investing in an index fund.