Market research doesn't have to be complex surveys or industry reports.The best source for finding problems could be your daily frustrations.Real problems are those that are repeated, people pay for broken solutions and impact their daily routine.Competition is needed for a market to exist.Use Sensortower to research competitors by checking their ranking history, downloads, revenue, and reviews.Cross-reference Sensortower data with App Store reviews.Add up revenue of 3-5 players to measure the demand of the market.Green lights are steady growth, players making $500k+, and similar complaints.Red flgs are a decline in revenue, downloads, or top player taking >70% of the market.Find problems that are already making someone else money and build a MVP that solves them.