There is no universally cheapest mobile framework. The cost sits in the product constraints: platform-specific behavior, team skills, native integrations, release ownership, and how long the app must remain understandable. A framework decision is useful only when it makes those constraints explicit.
Start with the product boundary
Ask five questions before comparing syntax:
- Does the product depend on a new or unusual platform capability?
- Are Android and iOS expected to feel identical, or appropriately native?
- Which engineers will own the app after launch?
- How much native code, device state, offline behavior, or background work is required?
- What release and support constraints already exist?
Native Android and iOS are strongest when platform depth, first-party APIs, accessibility behavior, or high-performance graphics are central. They also make two clients and two release surfaces explicit.
Flutter can be a strong fit when one team benefits from a shared UI and the product has a coherent cross-platform interaction model. It still needs platform boundaries, native plugins, and release expertise; “one codebase” does not mean one operational surface.
React Native can work well when a product already has strong TypeScript/React capability and the native bridge surface is understood. MAUI can be a rational choice for a .NET organisation with a clear reason to share mobile and desktop capability. Neither should be chosen solely because a comparison table calls it cheaper.
Compare the cost you will actually carry
| Constraint | Native | Flutter | React Native / MAUI |
|---|---|---|---|
| Platform fidelity | Highest by default | Requires deliberate boundary work | Depends on bridge/plugin quality |
| Shared UI delivery | Low | High for suitable surfaces | High for suitable surfaces |
| New device API access | Direct | Plugin or platform channel | Native module or handler |
| Team constraint | Two platform specialties | Dart plus native literacy | Existing JS/TS or .NET plus native literacy |
| Release ownership | Two clients | One shared app plus platform stores | One shared app plus platform stores |
The right comparison includes hiring, debugging, CI, signing, crash triage, plugin maintenance, and the cost of keeping a team capable of changing the app two years from now.
Make a reversible decision
Write down the must-have platform capabilities, the first release slice, the team’s existing strengths, and the failure mode that would force a native escape hatch. Prototype the riskiest integration, not a polished login screen. A small device, offline, or background-work spike tells you more than a broad feature matrix.
The practical outcome is often a boundary decision: shared product behavior where it is stable, native code where the operating system is the product, and a migration path if the first assumption proves wrong. That is more durable than naming one framework the winner.