How to Ask Lovable to Improve an Existing Application

To improve an existing Lovable app, identify the exact problem, the affected page or flow, the expected result and the features that must remain unchanged. Ask for investigation before changing unfamiliar or risky areas, then verify both the improvement and the surrounding workflows.

What you will learn and need

You will scope an improvement, write a useful request and check for regressions. You need an existing project you can edit and a working example of the issue. If you are new to the platform, Join Lovable and start with a small project before modifying a larger app.

1. Record the current behaviour

Write what happens now and why it is a problem. “The mobile search button overlaps the input” is actionable; “the app feels bad” is not. For a bug, record the exact steps, the page, relevant account state and expected outcome.

Capture a screenshot when the issue is visual. Remove private information before sharing it. For failures involving saved data, include whether the problem occurs before or after refresh; that helps distinguish appearance from persistence.

2. Decide whether the change is visual or behavioural

A request to change spacing should not silently become a rewrite of data loading. State “appearance only” when appropriate. A request to change who can see a record requires behaviour and access enforcement, not merely a visual edit.

Name protected areas: account sign-in, existing records, payment flows, navigation and established URLs. Preserve only what really must remain unchanged; if a dependency must change, ask Lovable to explain why first.

3. Ask for the smallest useful improvement

On the existing customer list, improve scanning and narrow-screen layout.
Show the customer name clearly and keep the existing search and sort behaviour.
This is a presentation-only change; do not alter data, permissions or URLs.
Preserve the current account and customer-edit flows.
Verify that long names fit and search still returns the same records.

For a deeper change, switch to Plan mode first:

Investigate why customer edits sometimes disappear after refresh.
Steps: open a customer, change their phone number, save, then refresh.
Expected: the new number remains. Actual: the old number returns.
Inspect the save and read-back path, then propose a focused fix.
Do not rewrite unrelated features.

4. Use references without copying hidden assumptions

A screenshot or selected preview element can clarify which control you mean. Explain the desired hierarchy, spacing or interaction in words as well. A reference does not specify your business rules, permission model or data storage.

When giving design feedback, make it concrete: “Keep all four links on one row at this width” or “Use the existing button style.” Avoid repeatedly asking for “more professional” without saying what is wrong.

5. Verify the changed and unchanged flows

Test the new behaviour using realistic input, then run the adjacent workflow. After a customer-list edit, check search, sorting, opening a customer and saving an edit. If the request involves private data, test a regular account and a separate account’s records.

Check both wide and narrow layouts for a visual change. Confirm that loading and failure states still make sense. A successful build or a good screenshot does not prove every interaction works.

Recovering from a bad change

Stop adding new requests when a regression appears. Give the reproduction steps and identify the last working state. Lovable’s version history can help restore earlier code, but reverting code does not restore deleted or changed database data. Treat data recovery as a separate concern and avoid destructive experiments on live records.

If several fixes fail, return to Plan mode for root-cause investigation instead of asking for the same correction again.

Common errors and fixes

• A tiny request triggers a broad rewrite: explicitly state scope and preserved behaviour.
• The bug cannot be reproduced: add exact steps and the account/data state.
• Only the happy path is checked: include invalid input, saving failures and refresh.
• A revert is assumed to restore data: check stored records separately.

Frequently asked questions

Can Lovable improve an app it already built?

Yes, you can request changes to an existing project. The quality of the request and verification still matter.

Should I redesign the whole app at once?

Usually not. Improve a coherent screen or journey, check it, then proceed to the next task.

What should I send for a visual bug?

The page, affected window size, screenshot if available, expected layout and what must stay unchanged.

Official sources and next steps

See prompting best practices, building a real product and Plan mode. Explore related live content below.