Something in your AI-built app is broken, and you have decided it is time to actually pay someone rather than keep prompting the AI yourself. The obvious next question, who exactly, has three real answers. Most advice on this general subject only ever compares two of them, and skips the one that costs the least.
Option one: go back to whoever or whatever built it
If a specific person or small team originally built your app using an AI tool, and you are still on reasonably good terms with them, this is worth trying first. They already understand the decisions that were made, even the ones that were never written down anywhere, and fixing something in a system you built yourself is almost always faster than fixing it in a stranger's.
If instead the app was built directly through a platform such as Bolt, Lovable, or Replit, with no individual developer in between, the equivalent move is checking what support the platform itself offers, its help documentation, its community forums, or a support ticket. This option is free or close to it. Its real limit is scope. A platform's support team can usually help with something the platform itself is responsible for, an outage, a known bug in the tool. It is far less equipped to help with a problem specific to how your particular app was set up, because that was never really the platform's job to understand in the first place. And if the original developer has gone quiet, moved on, or was never that reachable to begin with, this option quietly disappears, which is worth knowing before you spend a week waiting on a reply that is not coming.
Option two: hire a freelancer
A freelancer is usually the cheapest and fastest route to fixing one specific, well-understood problem. A checkout button that stopped working. A page that crashes on a certain phone. If you can describe the bug clearly and it does not touch anything sensitive, a good freelancer can often turn it around quickly and for a modest amount.
The tradeoff is that you are relying on one person, with one set of skills and one set of working hours, and no one double-checking their work before it goes live. That is a reasonable risk for a narrow, cosmetic fix. It is a less reasonable risk for anything that touches how user data is stored, how payments are handled, or how several parts of the app talk to each other, since a fix in one place can quietly create a new problem somewhere else, and a single freelancer working alone is less likely to catch that before you do.
Option three: hire an agency
An agency costs more, and that additional cost is buying something specific: more than one set of eyes on the problem, a process for checking that a fix does not break something else, and someone still around if the same issue resurfaces next month. This matters more the bigger and more tangled the problem is, particularly anything involving security, user accounts, or several connected systems, where an unreviewed change from one person carries real risk.
For scale, industry figures for this kind of work put a one-time fix from a dedicated firm anywhere from roughly two thousand dollars for something narrow up to fifteen thousand dollars or more for something extensive, with ongoing monthly support arrangements running from around one thousand to thirty-five hundred dollars, according to pricing data referenced in broader market research on this space. Those are global market figures, not a quote for any specific job, but they give you a sense of where an agency-level engagement tends to sit compared with a single freelancer.
What should actually decide it
There is no single right answer here, and anyone who tells you there is one is selling something. A narrow, well-defined bug in an app you understand reasonably well is a fair reason to try a freelancer, or the original builder, first. A problem that touches money, personal data, or more than one part of the system at once is a fair reason to bring in an agency instead, even though it costs more, because the cost of a fix that quietly breaks something else is usually higher than the fee you were trying to avoid. And if the app was built by someone still reachable and willing to help, or by a platform whose own support can actually diagnose the issue, it is worth ruling that option out first, simply because it is the cheapest one, before assuming you need to hire anyone new at all.
If you get to the point where you genuinely are not sure which category your problem falls into, that uncertainty is itself useful information. It usually means the safer starting point is an assessment rather than a fix, someone looking at what is actually going on before anyone commits to a solution. That is the entire premise behind our own code cleanup work, and it is worth asking any option you are considering, freelancer or agency, whether they are willing to start there too.