---
title: "Fair use & limits"
description: "AI credits, concurrent previews, and other limits — what they are and what happens at the boundary."
url: https://evonx.ai/docs/trust/fair-use-and-limits
locale: en
updated: 2026-09-04
---

# Fair use & limits

AI credits, concurrent previews, and other limits — what they are and what happens at the boundary.

Two caps show up in daily work: **AI credits** for generation, and **concurrent
previews** for how many isolated apps can run at once. Both follow your plan —
numbers live on [pricing](/pricing), not here.

## AI credits

Chat, Evolution Threads, Analyse & Fix, SEO Studio, Asset Studio, ads drafts,
and the [in-app AI gateway](/docs/launch/secrets-and-in-app-ai) draw from the
workspace allowance. Watch the balance under **Settings → Billing & Usage**.
You can add credit packs from that same screen when the period is not over
yet.

When the allowance is gone, new AI work cannot start until you add credits or
the period renews. A published app that is not calling the AI gateway keeps
serving Garage Usta's customers — publishing and custom domains do not pause
because a thread cannot run.

> **Note**
> Plan contents, prices, and pack sizes are only on
> [pricing](/pricing). These docs will not restate them.

## Concurrent previews

Each plan allows a number of previews at the same time (or unlimited on some
tiers). The current cap is on **Settings → Billing & Usage** and on
**Settings → Active Previews**.

Hit the cap? Stop a preview you are done with in the
[Preview Hub](/docs/preview-and-debug/preview-hub), then start the new one.
Idle previews stop on their own after 15 minutes, which frees a slot without
you deleting code — the repository is untouched.

## Related

- [Pricing](/pricing) — plans, credits, and preview capacity.
- [Troubleshoot previews](/docs/preview-and-debug/troubleshoot-previews) — the
  "new preview will not start" case is often this cap.
- [Add AI features to your own app](/docs/use-cases/add-ai-to-your-app) — in-app
  calls spend the same credits.