Mobile app or micro SaaS: which should you build?
October 1, 2026 · 6 min read
Both can be run by one person, and both can pay for a life. They differ in the thing that decides most small products: how customers find you. An app is found in a store search; a SaaS is found wherever you manage to be.
In short
- The biggest difference is how customers find you: store search for an app, your own channels for a SaaS.
- The stores keep 15–30%; a payment provider keeps a few percent.
- Build an app when people search the stores for the job; a SaaS when the buyer is a business at a desk.
On this page4 sections
01How customers find you
App stores are search engines with buyers in them. If people search for the job your app does, a good listing can bring installs every day without a marketing budget. The catch: you compete for the same few positions as every other app for that search.
A micro SaaS has no store. Customers come from search engines, communities, integrations and word of mouth — slower to start, but the channels are yours.
Mobile app
Consumers with a job they search the stores for.
Works for you
- Store search brings buyers every day
- Paying is one tap for the user
- Reaches consumers worldwide
Costs you
- 15–30% store commission
- A review for every release
- Competes for a few top positions
Micro SaaS
Businesses, and work done at a desk.
Works for you
- Keeps all but a few percent of revenue
- Higher prices; yearly and team plans are normal
- Ship whenever you like
Costs you
- No store to bring buyers: you find every customer
- Servers, uptime and security are yours
- Support for fewer, more demanding customers
02How you get paid
Apps take payment through the store: easy for the buyer, and the store keeps 15–30%. Prices tend to be low and consumer-sized.
A SaaS takes payment directly, through a payment provider that keeps a few percent. Prices can be higher, especially for businesses, and yearly and team plans are normal.
| Mobile app | Micro SaaS | |
|---|---|---|
| Payment through | App Store or Google Play | A payment provider |
| Fee | 15–30% | Usually a few percent |
| Typical buyer | A consumer | A professional or a business |
| Typical price | Consumer-sized | Often higher, with team plans |
| Releases | Store review each time | Whenever you deploy |
03What each asks after launch
- Apps: store reviews, a new OS every year, device fragmentation (especially on Android), and a review process for every release.
- SaaS: servers, uptime, security, and customer support by email — usually from fewer, more demanding customers.
04A simple way to choose
Build an app when people search the stores for the job and the leaders charge: the store brings you the buyers. Build a SaaS when the buyer is a business, the job happens at a desk, or the value grows with data and integrations.
Either way, check before you build: is the job searched, do people pay, and is there room for one more?
SideRadar answers those three questions for every app niche in the App Store and Google Play, scored every night from the stores' own data. How we score