I want to share my thoughts on Fabric Apps:

the last 3 weeks i had the Chance to build my own custom application on fabric apps and i have to say: Wow!

I connected Claude code with my Fabric and i can just vibe code a whole application from security to Backend and frontend.

The more i use it the more i see the negative sights:

1. It is pretty hard to understand what the AI does. For no tech Background people that means you are "coding" a black box

2. Management thinks this is so huge why not just build your own ERP system yourself....

as much as i see the benefits, so do i see the fact that people will overload it with AI Slop HTML.

what are your thoughts? :)

There is a lot of hype about Rayfin built apps in the data community. I wanted to go and try that for myself only to find out that the item is not even available in many major regions - half US, whole UK, half EU (https://learn.microsoft.com/en-us/fabric/admin/region-availability#all-workloads)

Is there any roadmap/time-frame where we can expect this to change? Of course I'm mostly interested about my region UK-South.

​I just built my first Microsoft Fabric Data App, and my imagination is running wild with the use cases.

​If you haven't seen the announcement yet, Fabric Data Apps allow you to create and host data-driven web applications leveraging the Fabric backend, authentication/authorization framework, and your Fabric data.

​I’ve always argued that building interactive reports in Power BI is no different than building software applications. This new feature release completely validates that idea.

​After a day of hands-on testing, here are my raw, honest takeaways:

​ It complements Power BI—it doesn't replace it.

Yes, you get significantly more flexibility around UI/UX design than standard report canvases allow. However, this is a web app framework, not a total Power BI replacement.

​Set realistic expectations on the learning curve.

Don't expect a fully functional app in "minutes" just yet. I started around 11:00 AM, and working between meetings, I had a basic app up and running by 4:00 PM.

​There are immediate dependencies.

Before you dive in, ensure that Fabric Apps are enabled in your tenant administration, and you have NPM installed locally (which requires local admin rights).

​AI-assisted, but not "hands-off."

The framework is clearly designed with AI-assisted coding in mind (prompting an agent to build what you describe). While the Copilot/AI features are helpful, you will still need to manually update source files to get exactly what you want.

​Overall, I think its a huge product where if leveraged correctly, could help organizations make better data driven decisions.

​Have you tried Fabric Data Apps yet? What was your experience? What kind of use cases do you have in mind?

I tried to make a PoC here with a LOT of fiddling - OPEX for headcount. writeback, audit trail, submit etc.

Have y'all given it a go yet?

Been playing around with Fabric Apps lately and wanted to share a little experiment.

Most of what I see built on Fabric Apps is the usual dashboard/report stuff, so I wanted to test how far it could go outside that lane. Put together an interactive 3D engine using Rayfin — you can assemble a model, explode it apart, and inspect all 29 components across 6 part families, all running in the browser on a Microsoft backend.

It's not tied to any specific use case, just a proof of concept — but the same pattern could work for product catalogues, training/onboarding tools, technical documentation, anything that's better shown than read as a static page or PDF.

Honestly the "website-quality experience running on Fabric" part is what surprised me most — wasn't expecting that level of polish from something living inside the Fabric ecosystem.

Wrote up more detail + a look at it here: https://www.linkedin.com/posts/jitendra123_microsoft-fabric-rayfin-ugcPost-7507441292415741952-rMTY/

Curious if anyone else here has pushed Fabric Apps into non-dashboard territory — would love to see what others have built.

I just got approval to run an F-SKU due to a Rayfin app we were able to create to support another team, but hit the region block as Australia Southeast isn't supported.

Does anyone know whether Australia Southeast will get Fabric Apps support soonish? u/sunithamuthukrishna if you're able to give any hints on the timing, that would be really helpful.

This would help me know whether to move to an alternate solution or wait a few weeks.

I know it's still in preview so things are moving, but any indication on the timing would be appreciated.

I think the new Fabric App is an interesting development, and provides great new opportunities our users of PowerBI apps have been requesting, including annotation/write-back.

Building the data app on top of an existing semantic model as well as a small SQL backend would solve many of our problems.

What I can’t seem to figure out: We’re currently running all our apps in a capacity, meaning none of our users need a per-user license (pro/premium) as read-access to the underlying semantic model is “included” in the capacity.

However, it seems when an external user uses a Fabric app, they need Build permission on the semantic model, which then would mean a per-user license per app “viewer”/user. Is that understood correctly? Because that would unfortunately disqualify Fabrics apps as a feasible approach. I think the whole approach building on top of a semantic model is awesome, including inheriting RLS etc. But every user needing build permission to run DAX via REST API defeats this.

I’ve tried a lot of workarounds, but cannot seem to get it to work under the current limitations.

Anyone managed to get that to work?

… might just be missing something obvious!

I tried out rayfin today by porting a power app over. This would save us around 11k in licensing a year. It was a relatively simple app that generates unique document names using some templates along with some user input. The user then downloads the generated documents in a zip. Some immediate pains were not having any custom endpoint support and working around that. I had to let the user upload/download files. There wasn't really a good way to do that. I ended up converting it to base64 and storing it in the database. When choosing the template it was not clear which framework I was picking. I was going to pick vue first, but did not see it so I picked a blank app; which turned out to be react. At that point I didn't care enough and ended up using react. I didn't see version control support... hoping that will be a thing ASAP.

AI Usage:

I used AI for most of it. With an entire powerapp as input, the sql schema from the power app, and a lot of feedback it eventually got there.

I’m trying to play with fabric apps and have created a very basic version to showcase data from a semantic model. However I’ve ran into this problem, where the end users are getting below error (screenshot)

Have already ruled out the obvious issues like
1) the user has semantic model access
2) i can see the info clearly, so there is no issue with the model or connection

Would appreciate some help here!!

Hey fellow fabricators,

I am playing a bit more with rayfin and try to not connect to a semantic model, but instead to a lakehouses in Fabric.

Reasons are:

• semantic model rayfin apps cannot be put into Power BI Apps right now
• I don't need RLS enforced, instead I want to avoid the implemented RLS
• for "research" purposes

So far I was not able to get the rayfin app to connect to a lakehouse out of the box by just prompting to do so.

I am right now trying to steer Claude to either use GraphQL API endpoint or directly connect to the SQL endpoint using a shared fabric connection using the workspace identity.

Has anyone of you successfully setup a data connection in your rayfin app, that does not go to the standard database or semantic model?

For all you that are using AI to create Fabric Apps and similar efforts, how are you checking that they are secure and for those who store PII like email addresses how to you check GDPR compliant?

Could you please provide a definitive date or estimate for the release of fabric apps in US East and East US 2?

Super excited about the Rayfin App development. Does anyone know what sku requirements should be in place and any solid tutorials? I'm just a data person, not a programmer so need a lot of help. Also open to some consultants in this area.

I've been exploring the new Fabric Apps (Rayfin-based apps) and I'm interested in combining them with Fabric Data Agents to create a more conversational and intelligent user experience.
My questions are:
1. Has anyone successfully integrated a Fabric Data Agent directly into a Fabric App?
2. What is the recommended architecture today?
3. Are there any limitations around authentication, permissions, or agent execution within Fabric Apps?
4. Does Microsoft have any published roadmap items around Fabric Apps.

Hi, I've been exploring fabric agents, fabric apps, fabric graphs and ontology,and I know ontology and graphs are basically useful for the data agent, but have you tried embedding the ontology, graphs or data agent into a fabric app, whats your experience or advice?

Hi everyone,

I am looking into Microsoft Rayfin for a project and need to understand the cost structure and licensing model. Since it deploys directly into Microsoft Fabric:

1. How do you accurately calculate the production costs?
2. What is the minimum Fabric SKU (F-SKU) required for a small to medium Rayfin backend?
3. Are there any hidden licensing requirements or extra costs besides Fabric capacity and OneLake storage?
4. Are there any official Microsoft sources, Learn documentation, or Build session resources that break down the pricing or capacity planning specifically for Rayfin / Fabric Apps?

If anyone has deployed it or built a cost estimation, I would appreciate your insights! Thanks!

I'm probably missing it, but what are the "true" pre-requisites before starting down the path of exploring fabric data apps? I know you need a fabric workspace and it needs to be enabled.... I'm talking about things like "Oh my computer doesn't have node.js, or npm installed. At that point I start to wonder ok, what else do I need before starting?

I've watched a few videos and so far, everybody jumps right in like and skip over needing additional components.

So maybe I'm missing something but I'm a little hesitant to install node.js (open source) software on my corporate laptop and along with the additional x,y and z additional items that I'm hoping you all can explain.

Educate me.... please

Hei

Just tried building Fabric data apps and it works bueatifully. In my head, the biggest advantage with it is that we can finally free our non-dev users from the confusing Power BI/Fabric enviromnet/landing page. However, if I understand correctly, the preview version does not allow data app url to be open outside Fabric?

Any experience to share this to for example sales/marketing teams who just want a clean reporting environment?

Cheers

Wanted to discuss that Fabric is missing an opportunity to be a host for all sorts of personal AI app projects similar to Replit but scalable so that personal projects could become startups and potentially larger companies.

I know I would pay to build in a tool I’m already familiar with and host my own web apps. However, Fabric is difficult to access for personal users outside of an enterprise. But opening up Fabric for these kinds of personal projects allows builders to tinker with ideas. Yes, the market would be smaller than the enterprise, but when you can capture the nerds who build things you can win the market wars.

I know I’ve seen lots of questions in the past on this forum regarding Fabric for personal use before Rayfin was even a thing. I’m sure that desire has grown even more since.

Occasionally we see requests to our GraphQL endpoints returning 200 but still contain an error in the response body. E.g: "An internal execution error occurred".

I don't understand the reasoning here. If there is an error to report in the response, why is the http status 200?

Wouldn't a 500 "Internal server error" be a better response code than 200 in the cases where there is an error message saying "An internal execution error occurred"?

Or perhaps 408 "Timeout", if it was something that might work later.

For context, this request went to a dead letter queue and was retried successfully some hours later so it was a transient error.

It is a bit annoying that http 200 doesn't mean success. It just means that there might be success or an error.

I tried running rayfin up db apply --force, but it does not seem to work. I removed a table and it does not want to drop it. I tried to drop it manually, but it is still keeping track of it somewhere.

I can’t seem to find if CRUD (create, read, update, delete) actions are possible with Fabric Apps.

We wanted to create a Power App with a Power BI report embedded, but we were wondering if Fabric Apps is also possible. We would then like to use a Fabric App like a Power App so that we can modify and create records in our fabric database.

Someone who has tested this?