- TestReady (iOS): $9.99 per mock, streaks plus daily tasks, iOS reminders that actually fire. - IELTS Prep App (British Council): free official material, no streaks. - Magoosh IELTS/TOEFL (iOS): solid lessons, subscription. - E2 Test Prep (iOS): free tier with good writing feedback. - Streaks (iOS): not a test app, but the best pure streak tracker. Pair it with any question bank. Sources: IELTS The streak is the feature. A 30-day streak of 20-minute sessions beats two 8-hour cram weekends. Set the reminder for the same time daily and protect it like a class.