Time & Materials vs Fixed Price

Time & Materials

Billing based on the actual number of hours worked and for materials (e.g. licenses, photos).

Recommended when:

  • There is only an idea, a concept.
  • It is not possible to estimate the size of the project
  • A certain number of selected functions have been planned, but it is not known which will prove useful and which will be removed
  • There is no accurate documentation.
  • There is a high probability of sudden significant changes in the project during the implementation process.
  • Our task is to implement in accordance with the established documentation that will be developed on the basis of the presented concept, idea.


  • Flexibility in developing functionality
  • The dynamics of budget planning relative to plans
  • Accounting for stages
  • Ability to modify currently implemented functionalities


  • Continuity of planning and making important decisions
  • Constant contact with the contractor’s project manager required


  • we prepare the initial project budget based on the agreed list of functionalities
  • the settlement is based only on the actual time spent on the project
  • settlements are based on stages of various lengths (weekly, biweekly and monthly)
  • we provide a report of hours worked

Fixed Price

Pre-established price. Accurate project documentation. Payment for all or stages. No changes will be made during implementation process.

Recommended when:

  • All project information has been established (e.g. existing graphic design, documentation, flow)
  • There is a list of functionalities and screens that will be implemented in the project
  • No modifications will be made to any of the application modules during implementation
  • We know how big the potential user base will be
  • Our task is to make a 1: 1 project in accordance with the documentation and information that will be provided to us.


  • Easy management during the project – just pick up the finished work
  • Pre-defined budget
  • Specified project end date


  • Difficulty in determining assumptions at the beginning of the project
  • It is impossible to predict all the functionalities of the product
  • Specifications often need to be changed during the project


  • we prepare an offer together with the date of submitting the project or the date of the end of individual stages
  • payment for agreed stages
  • each stage has a fixed implementation cost

Mobile App Development Price

Examples for Fixed Price


Perfect for startups

€10 000 - 30 000

  • Mobile application for one Android / iOS system
  • Phone version
  • Vertical or horizontal orientation
  • No integration with WWW / API
  • The basic scope of functionality
  • Implementation of Google Play or the App Store
  • Delivery time from 2 weeks to 1 month


Ideal for small and medium businesses

€30 000 - 60 000

  • Mobile application for Android and iOS
  • Phone and tablet version
  • Vertical and horizontal orientation
  • Two language versions (English and Polish)
  • Integration with WWW / API
  • Intermediate range of functionality
  • Implementation of Google Play and the App Store
  • Delivery time from 1 to 2 months


Ideal for large companies and corporations

from €60 000

  • Mobile application for Android and iOS
  • Phone and tablet version
  • Vertical and horizontal orientation
  • Multi-language version
  • Integration with WWW / API
  • Advanced range of functionality
  • Implementation of Google Play and the App Store
  • Delivery time from 1 to 3 months
* The prices are net prices


Frequently Asked Questions

What does the project valuation process look like?

1. The process of gathering the necessary detailed information about the project and its functional list.
2. Preparation of the list of screens and functionality based on the collected information
3. Estimate the complexity of each part of the project along with an estimate of the number of hours needed to implement it.
4. Estimation of time needed to complete the UI / UX graphic design
5. Send a quote to the customer

How long does the project evaluation process take?

The length of the process depends on the project. From its requirements, list of functions and the amount of information we receive. This process can take from a few days to 2-3 weeks.

What does the mobile application implementation process look like?

1. Creating technical documentation with a list of functions.
2. Choose the form of cooperation (Time & Materials or Fixed Price).
3. Designing the application icon and designing the UI / UX application.
4. Customer acceptance of the UI / UX icon and graphic design.
5. The process of writing a mobile application in accordance with the UI / UX documentation and graphic design.
6. Complete the application writing.
7. Tests of the final product and verification of compliance with documentation.
8. Implement Google Play and / or Apple AppStore
9. SLA / Support

What is the cost of SLA (Service Level Agreement) / support?

In the case of small / medium mobile applications that do not require immediate response to problems or 24-hour support, the cost of the SLA starts from about €5000 per month. For larger projects with a large user base and minimal downtime, a dedicated team would be needed. The cost of such support is agreed individually with the client.

For mobile applications that do not require immediate response to problems or quick 24-hour support, the monthly cost starts from €2000.
If the mobile application has a large number of users and the fastest possible response time, a special team of developers will be required. The contract together with the costs is determined individually.

Write to us to know the estimated cost of implementing your project

We will answer all your questions and choose the best possible solutions.

Estimate project!