Mobile-first builder · Ranked 30 of 37 in the index
a0.dev Review (2026)
A chat-driven mobile app generator producing React Native and Expo projects, notable for how quickly it applies small changes and how little ceremony it demands.
3.5 / 5Last verified: · Next scheduled check: The quick answer
Assessed for 2026The tightest iteration loop in the index. a0.dev applies a small change and shows it on your phone faster than anything else we tested, taking 4.6 on speed and 4.2 on agent performance. It is also the thinnest product here: integrations at 3.0, no meaningful API, scalability at 2.9, and a feature set that assumes you are one person prototyping. Excellent for the first two days of an idea. Plan to move somewhere else by week three.
- Best for
- Rapid mobile prototyping where the loop between an idea and seeing it matters more than anything else
- Not for
- Anything that needs integrations, or a team, or a roadmap
- Price from
- 18 EUR
- Free tier
- Yes
The ten axes
Every builder in the index is scored on the same ten axes with the same published weights. This is how a0.dev performed on our test briefs.
- Reliability16%
- 3.6
- Integrations16%
- 3.0
- SEO and GEO13%
- 2.4
- Design quality12%
- 4.0
- Agent performance10%
- 4.2
- Speed9%
- 4.6
- Value9%
- 4.0
- Scalability7%
- 2.9
- API and MCP access5%
- 2.8
- Code ownership3%
- 3.8
Every axis is scored from 0 to 5 stars. The percentage is that axis's published weight in the overall 3.5 rating.
The verdict
The tightest iteration loop in the index. a0.dev applies a small change and shows it on your phone faster than anything else we tested, taking 4.6 on speed and 4.2 on agent performance. It is also the thinnest product here: integrations at 3.0, no meaningful API, scalability at 2.9, and a feature set that assumes you are one person prototyping. Excellent for the first two days of an idea. Plan to move somewhere else by week three.
A chat-driven mobile app generator producing React Native and Expo projects, notable for how quickly it applies small changes and how little ceremony it demands.
The dissenting view
One panellist argued the scalability mark punishes a tool for not attempting something it explicitly does not sell, and that prototyping tools need their own axis weighting.
One member of the panel disagreed with the consensus. We publish the disagreement rather than average it away.
What it looks like
Pricing
Free tier with daily limits, paid plans from about 18 EUR per month
| Plan | Price | Billing | What you get |
|---|---|---|---|
| Free | Free | monthly | Daily generation limits, preview only |
| Pro | 18 EUR | monthly | Higher limits, code export, device preview |
Feature by feature
The same eleven checks, run on every builder in the index.
| Capability | Status |
|---|---|
| Full-stack backend | Partial, hosted basics |
| Database included | Yes, simple hosted store |
| Auth included | Yes, basic |
| Code export | Yes, Expo project |
| GitHub sync | One-way push |
| One-click deploy | Yes, Expo preview |
| Custom domain | Not applicable |
| Mobile or native output | Native iOS and Android via Expo |
| Team collaboration | No |
| Public API or MCP server | No |
| Self-hosting the output | Yes, after export |
What works / What does not
What works
- Fastest iteration loop of any tool in the index at 4.6 on speed
- Agent performance at 4.2 on small, well-scoped changes
- Expo source export even at the low entry price
What does not
- No team features at all
- Integrations at 3.0 and no API surface
- Scalability at 2.9 makes it a prototyping tool in practice
User reviews
4 ratings for a0.dev, editor panel first. Community ratings accumulate on top of our seeded launch score.
Community rating
- 5 ★50%
- 4 ★50%
- 3 ★0%
- 2 ★0%
- 1 ★0%
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- Editor panel
The tightest change-and-see loop I have used anywhere
DeShawn Price@deshawnprice
Solo founder of a fitness app with 900 paying users. Built it twice, second time properly.
Ask for a change, look at your phone, it is there. Nothing else I have tried is close on that one measure, and in the first two days of an idea that measure is the only one that matters. I would not run a company on it and I do not need to.
- Pros
- Iteration speed is genuinely unmatched.
- Cons
- No team features at all.
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- Editor panel
Perfect for two days, wrong for two months
Kenji Morisaki@kenjimorisaki
Contract mobile developer. Ships React Native and Flutter for clients who cannot decide.
Superb for exploring an idea, and I keep it for exactly that. There are no integrations worth the name, no API, and no collaboration, so a second person joining is where it ends. Export gives you an Expo project to continue elsewhere, which is the right escape hatch.
- Pros
- Fast, cheap and exports a real project.
- Cons
- Thin integrations and no way to work as a team.
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Frequently asked
- What is a0.dev best at?
- Speed. It shows a change on a real device faster than anything else we tested, which is exactly what early prototyping needs.
- Can a team use a0.dev?
- Not really. There are no collaboration features. It assumes one person and one idea.
- Can you keep the code?
- Yes, it exports an Expo project, giving it 3.8 on code ownership.
Sources
- a0.dev product site · 14 August 2026
- a0.dev pricing page · 14 August 2026