Eight weeks is the sweet spot for IELTS prep. Long enough to fix a weak section, short enough to stay urgent. But most of what's sold as an 8 week IELTS study plan app doesn't deserve the name, so here's how to evaluate one before you hand it eight weeks of your life.
First, it should start with a diagnostic, not a generic week one. Your plan for moving writing from 5.5 to 6.5 looks nothing like someone else's plan for pushing listening from 7.5 to 8.5. Any app that gives everyone identical day one tasks is a content library wearing a plan costume. Second, it should rotate all four sections weekly. Apps that let you binge your favorite section while writing quietly dies are working against you, no matter how nice the interface is.
Third, scheduled mock tests, ideally every two weeks, with score tracking. If the app can't show you a graph of your estimated band climbing, it can't tell you whether the plan is working. Fourth, task specificity. "Practice writing" is not a task. "Write a Task 2 essay on technology, 40 minutes, then compare against a band 7 sample" is a task. Vague tasks produce vague results, every time.
Now the honest part. Most apps labeled as a TOEFL study plan app or an IELTS planner are really question banks with a calendar skin. The planning logic, the part that decides what you do on day 34 based on your day 28 mock, is usually missing. That's fine if you're self directed enough to be your own coach. Most people aren't, which is why human built study plans still beat app generated ones on structure.
If you want the human built version, the personalized 8-week study plan at internationalstudyhelp.fyi starts with your diagnostic and sequences every day from there.