といっても

1. 1Even though it is X, the actual situation differs from what X would lead one to expect.Ex. 1
2. 2Although X is true, it is only true to a small or limited extent.Ex. 2

Used in both conversation and writing to downplay or correct what a word or statement might imply. The second clause often contains limiting expressions such as まだ, だけ, or それほど…ない. Compared with とはいえ and とはいうものの, it sounds more everyday and less formal.

• とはいえN1「とはいえ」 is formal and mostly seen in writing, news, and formal speeches; its follow-up clause points out that no obvious conclusion can be drawn from the first clause, often carrying a judgment or reminder. When correcting a degree, the two are often interchangeable, but 「といっても」 sounds more natural in daily conversation.
• とはいうもののN1「とはいうものの」 is written-style, common in speeches and commentary, and its second clause emphasizes an outcome contrary to expectations; it can also limit a degree, just more formally. At the start of a sentence meaning 'that said,' the two are similar but differ in register.
• もののN2「ものの」 is written-style and introduces a result that falls short of expectations, often with a sense of regret, whereas the second clause of 「といっても」 corrects the degree or content of the first clause. A noun before 「ものの」 requires 「である」. The two are generally not interchangeable.
• にしてはN3「にしては」 measures the second clause against the standard of the first, pointing out that reality doesn't match expectations, in either positive or negative ways; 「といっても」 acknowledges X and then corrects or downplays the impression. 「にしては」 has no sentence-initial use and doesn't take 「だ」 after a noun, so the two are generally not interchangeable.
• わりにN3「わりに」 uses the first clause as the standard of evaluation and points out that the result is better or worse than expected, as in a cheap dish that tastes good; 「といっても」 corrects the impression given by the first clause itself, with the second clause usually a qualification that lowers expectations. The two are generally not interchangeable.

とはいえ and とはいうものの carry a similar concessive meaning but are more formal and written, and ものの is a general "although" without the nuance of correcting what a word implies. にしては and わりに mean "for X / considering X" and comment on a result that deviates from what X would lead one to expect, rather than downplaying X itself.