Credits burn faster than page count suggests. Auth and database wiring cost a one-time setup on top of per-page credits, and a shipped app keeps billing separately for the Cloud/AI it calls at runtime — the part most builders don't show until the invoice.
Same app, three billing models
Lovable (credit tiers), v0 (flat Premium plan, generation-limited) and Replit Agent (per-checkpoint dollar billing) charge fundamentally differently — the numbers below aren't directly comparable line-for-line, but show what each model does with your project shape.
| Platform | Billing model | Estimated cost for this build |
|---|
Why "credits" aren't a unified currency across builders
Token-based LLM API pricing is at least consistent — a token costs what it costs, everywhere. AI app builders threw that out. Lovable weights each prompt by how much it changes: a small styling tweak is about half a credit, a complex page rewrite with an image generation can run up to two. Replit Agent skips credits entirely and bills in real dollars per effort-based checkpoint. v0 sells a flat monthly Premium tier with generation limits rather than a credit balance you watch drain. None of these numbers convert cleanly into each other, which is exactly why comparing builders by "credits" alone is misleading — the table above prices the same project shape on each platform's own terms instead.
The setup tax nobody budgets for
The calculator above adds a one-time credit cost when you flag a build as needing auth and a database, separate from the per-page cost — and that's not arbitrary. Wiring up authentication, user tables and data persistence takes meaningfully more back-and-forth prompting than adding a static page, which is exactly why Lovable's own published numbers show a 3-page CRUD-with-auth app costing 150-250 credits versus a 1-page MVP at just 30-60. Budget the setup separately from the per-page count, or a "5-page app" estimate will consistently undershoot the real credit burn once auth enters the picture.
The bill that starts after you ship
The subscription price on Lovable's pricing page is only half the story. Once your app is live, the Cloud and AI features it calls at runtime — database queries, AI features embedded in the shipped product, hosting — are billed as a separate usage-based layer on top of the subscription. That's the single most common source of "this cost more than I expected" complaints about AI app builders in 2026. Enter your best guess at that ongoing runtime number above; if you don't know it yet, treat the plan-only cost as a floor, not the real monthly bill. For the coding-agent side of AI development cost — Claude Code, Cursor, Copilot — see the coding agent subscription vs API calculator, a genuinely different tool since those bill by token/context rather than by UI-generation credit.