
Digitization in the middle class: How to measure your success
Digitization is no longer a trend for medium-sized enterprises, but a need to remain competitive. But how to measure the success of Digitalisie...

Estimate monthly run and maintenance costs for your mobile app.
In brief
The investment frame is EUR 357 – 29,597/month excl. VAT. Release cadence and support level change the monthly frame.
The calculation follows six visible stages. All figures remain planning values until scope and assumptions have been reviewed.
1. Capture inputs
The calculator records the visible project, volume, complexity and operating parameters selected on this page.
2. Add fixed components
Fixed base modules and selected add-ons are added without mixing them with recurring charges.
3. Apply multipliers
Quantity, complexity and scope factors multiply only the cost components identified for them in the calculator model.
4. Create the range
The calculator applies its documented lower and upper uncertainty factors to the base result; ROI views keep investment and savings visible separately.
5. Round and calibrate
Monetary result fields are rounded to the nearest whole euro. Public project-cost components are calibrated with the centrally maintained display factor.
6. Classify the result
The result is shown as non-binding guidance. A binding quote requires scope, data, integrations, risks and acceptance criteria to be reviewed.
Efficiency or discount factor: A central display factor of 0.7 is applied to public project-cost components to keep all calculators aligned with the currently reviewed pricing basis. It is not a customer-specific discount; customer-entered wages, revenues and existing operating costs are not reduced.
Why this is not a binding quote: The calculator cannot verify complete requirements, third-party dependencies, data quality, legal constraints or acceptance criteria.
Concrete project profiles with assumptions and indicative budgets—useful for internal alignment alongside the calculator.
The upfront cost can be spread over 72 months. Terms are on the software financing page.
FAQ
Release cadence, user volume, support SLAs and how many platforms you ship.
Weekly releases with broad device coverage multiply QA time compared with a calm monthly train.
Review guidelines shift, metadata must be updated and binaries re-tested.
Each submission consumes engineering hours even when features are small.

When crash reports show hardware-specific defects or when you serve regions with fragmented Android fleets.
It prevents bad reviews that are costly to reverse.
Allocate recurring capacity each quarter plus on-call buffer for zero-day reactions.
Ad-hoc patching usually collides with feature roadmaps and slips silently.
Key factors are the release frequency, the number of supported devices and operating system versions, and the extent of backend connections.
An app with frequent feature updates causes more ongoing effort than a stable app in maintenance mode. In the cost calculator you enter these parameters to get a monthly range.
Apple and Google release new operating system versions every year that can force adjustments to SDKs, permissions and APIs.
Without regular updates you risk crashes or removal from the store. These maintenance cycles are predictable and should be a fixed item in the budget.
With crash reporting and performance monitoring you detect issues early, before they affect many users and trigger expensive emergency work.
Good monitoring costs little to operate but significantly reduces the follow-up costs of unexpected outages. We recommend it as a standard part of every maintenance package.
As an experience-based value, simple maintenance packages fall in the low three-figure monthly range, while apps with many integrations and short release cycles are higher.
The agreed response time has the biggest impact. The calculator shows an orientation that we tailor to your needs in a conversation.
A fixed package with defined response times pays off as soon as the app is business-critical or regularly serves users.
For rarely used apps, billing by effort can be cheaper but carries the risk of longer downtimes. In the cost calculator you can roughly compare both models.
The annual developer accounts at Apple and Google as well as push and signing certificates are separate ongoing items and belong to the maintenance budget.
They occur independently of the actual programming. We list them transparently so no hidden follow-up costs arise.
Four checks: stores, operating systems, crashes and response time. The monthly band stays in the short answer.
1. Count the stores
iOS and Android are separate update paths. Internal distribution without a store is a third path.
2. Set device coverage
Which OS versions must still run sets the test effort. Everything from the last five years is not the default.
3. Crashes as a trigger
Crash rate and store reviews start work. They do not replace the monthly fee.
4. Name the response
Response time and who approves a release belong in the contract. Emergency call-outs are a different line.
| Model | When it fits | Budget & flexibility | Typical risks |
|---|---|---|---|
| Fixed price (fixed scope) | Clearly defined scope, stable requirements, repeatable delivery. | Predictable total cost; little room for change without a change order. | Scope creep leads to change orders or quality trade-offs. |
| Time & Material | Discovery, legacy, evolving requirements, or close collaboration. | Maximum flexibility; budget transparent via hourly or daily rates. | Without prioritisation, effort can grow—backlog and reviews matter. |
| Retainer / maintenance package | Ongoing operations, updates, small features, and support. | Agreed capacity per month; predictable follow-on cost. | Large changes may still need a separate estimate. |
| Hybrid (milestone + T&M) | MVP or phased releases with clear go-lives, then iterate. | Core delivery fixed price; extensions on a time-and-materials basis. | Define contractually what is in scope vs. extra work. |
Calculators on this page provide indicative ranges; we choose the right model with you based on risk, scope, and planning horizon.
The ranges shown are indicative. For a binding quote we discuss scope, priorities and funding options in a free intro call. Many digitalization projects qualify for grants – try our funding calculator.
Browse all cost calculators, explore services and typical solutions. Questions about mobile app maintenance? Contact us.
After using the mobile app maintenance calculator, validate assumptions in a short intro call.
Browse all cost calculators in the costs overview.
How much does ongoing app maintenance cost?
Interactive estimate based on your inputs.
Non-binding project range from the software cost calculator: EUR 10,332 – 372,623 excl. VAT.
Methodology: The estimates are based on historical project data, complexity drivers and standard implementation assumptions. Results are a non-binding indication only; effort and price must be calculated individually.
If you are still deciding
If you are ready to implement
Calculator overall range
EUR 5,600–84,000 excl. VAT, depending on SLA and system criticality
The overall range is derived from the valid parameters of the relevant cost calculator.
Typical duration
2–16 weeks to establish the operating model
Main risk drivers
Non-binding indication
This result is only a non-binding indication based on typical assumptions. Effort and price must be calculated individually for your project.
Blog posts that put budget, effort and typical project paths for this calculator in context.

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