Start with what the app has to do for its first users, written as a short list of screens and actions. A booking app needs a calendar, customer accounts and reminders. An internal tool needs a table, a form and an approve button. That list tells you which kind of tool fits far better than any feature comparison.
Then decide how much control you need. Prompt-to-app builders such as Lovable, Bolt and Replit give you a working first version fastest, and they are less predictable when you need precise changes later. Visual no-code builders such as Bubble, Softr and Glide take longer to learn, and you see and control every screen and rule. Internal tool builders such as Retool fit apps your team uses on top of data you already have.
Look hard at where your data lives. Some builders keep everything on their own platform. Others connect to a backend such as Supabase, Firebase or Airtable, which you can keep using if you change the front end. Put the data account in your company name, turn on backups and learn how access rules work before real users sign up.
Ask what happens if you outgrow the tool. Code export or GitHub sync means a developer can take over. Without it, moving means rebuilding. That is fine for a test or an internal tool, and a real risk for a product you hope will grow for years.
Check how pricing grows. Many tools charge by AI credits, users, records or workflow runs, and a busy month can cost far more than the starting plan. Estimate your usage at ten times today, and read what happens when you hit a limit.
Think about who will look after the app day to day. A tool a non-technical teammate can update without help is often worth more than one with extra features that only one person understands. Ask each vendor how roles, version history and handover work, and try editing as a second user.
Use the categories on this site as a map of the pieces. Most small apps combine a builder for the screens, a backend or database for the data, an automation tool for the connections and a website for the front door. You do not need all of them on day one, and choosing them one at a time keeps costs and learning manageable.
Finally, build one small, real piece before committing: one screen, connected to real data, used by one real person. You will learn more from that afternoon than from any list of features, including this one.