What is Mushi Mushi?
Mushi Mushi adds a small “Report a problem” button to your app. When a customer taps it, Mushi Mushi explains what went wrong in plain English and writes the fix instructions for your AI builder: Lovable, Bolt, Cursor or Claude Code.
It is for people who build apps with AI tools and have real users. You don’t need to know how to code, and you don’t need any other tools.
How Mushi Mushi works
| Step | What you do | What Mushi Mushi does |
|---|---|---|
| 1. Add the button | Copy one line from Mushi Mushi and ask Lovable or Bolt to add it. In Cursor or Claude Code, it’s one command. About 5 minutes. | Gives you the line with your app’s details already filled in. |
| 2. A customer reports a problem | Nothing. | Your customer taps the button and types one sentence, like “the Pay button does nothing”. Mushi Mushi adds a picture of their screen, the page they were on and what they tapped. |
| 3. Read what went wrong | Open the report. It’s a short note in plain English. | Works out the likely cause, says how serious it is and how sure it is, and groups repeat reports of the same bug into one. |
| 4. Let your AI fix it | Copy the fix instructions into Lovable, Bolt, Cursor or Claude Code. Check the change, then publish. | Writes the fix instructions for your AI builder. When you mark the bug fixed, it can let the customer who reported it know. |
You stay in charge. Nothing changes in your app until you approve it.
You don’t need other tools. If you already use an error tracker such as Sentry, you can connect it, but you don’t have to.
What it costs
The free plan covers one app and 100 diagnoses a month, with no card and no AI key of your own. A diagnosis is one bug explained, and repeat reports of the same bug count once. Paid plans are for more apps. See pricing.
What about bugs nobody reports?
Most people who hit a bug just leave without telling you. You can check your live site free, with no sign-up, and connect deeper checks later. The page says what each one needs.
Next
- See a sample report: one bug from the customer’s words to the fix instructions, no sign-up.
- Set it up in Lovable or Bolt: no terminal, about five minutes.
- Who it’s for: which situation sounds like yours.
- Words you don’t know? Try the glossary.