instead; on the other hand — a conjunction used to present an alternative or contrast to something previously mentioned.
今日は映画には行けない。その代わり、家でゆっくり映画を観よう。
We can't go to the movies today. Instead, let's watch a film at home and relax.
給料は安い。その代わり、休みが多くて自由な時間が多い。
The pay is low. On the other hand, there are many days off and a lot of free time.
忙しくて会えない。その代わりに、手紙を送ったよ。
I'm too busy to meet. Instead, I sent a letter.