Appdevelz
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Apps

App development for your first useful version.

Start with the task your app should make easier. From a focused local tool to an MVP with a backend, we define what belongs in the first version.

from €1,000 excl. VAT from €1,190 incl. 19% VAT

One web/PWA or Android platform, one core workflow and local data storage.

Accounts, backend, payments, push, stores and iOS are separate. Third-party fees are additional.

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After your inquiry: concept within 12 business hours, or 48 above €25,000 excl. VAT. Also for complex projects.¹ The inquiry is non-binding.

Response times, requirements & exceptions
  1. You receive a concept within 12 business hours, or 48 business hours where the estimated project scope exceeds €25,000 excluding VAT. This also applies to complex projects. Time counts after a complete inquiry arrives through our form, Monday–Friday, 08:00–20:00 Europe/Berlin. Outside this window it starts at 08:00 on the next working day; public holidays at our company location in Starnberg, Bavaria, do not count. The concept sets out scope, approach, cost range and open questions. Clearly defined work includes a fixed-price proposal. If existing code, online multiplayer or sensitive data first require an audit or detailed concept phase, the concept identifies those steps and their proposal; a reliable implementation price follows that review. The inquiry is non-binding.

Scope & pricing

Choose a sensible first version.

These ranges cover the described package. Your written proposal confirms the exact scope, exclusions, price and schedule.

App Start

€1,000–€2,500 excl. VAT €1,190–€2,975 incl. 19% VAT

Scope: One web/PWA or Android platform, one workflow, local data storage and basic tests.

Separate: No accounts, backend, payments, push, maps, chat or offline sync. iOS, stores and specialist compliance are separate.

Delivery: 1–2 weeks after commissioning and kickoff.

Full package details

Included

  • One platform: web app/PWA or Android; iOS via TestFlight/App Store is an extra
  • One core workflow, such as a calculator, checklist, form-to-PDF or scanner list
  • Interface using our design system
  • Local data storage on the device
  • Basic tests and source code; delivery as a web link, APK or TestFlight where agreed

Not included

  • Accounts, login, backend, payments, push notifications, maps and chat
  • Store publication: €300–€600 excl. VAT (€357–€714 incl. 19% VAT) per store, plus platform fees
  • Design from scratch and offline synchronisation
  • Compliance beyond basic GDPR considerations, such as health data or payment services

MVP app with backend

€3,000–€8,000 excl. VAT €3,570–€9,520 incl. 19% VAT

Scope: Accounts, database, admin area, 3–5 screens, monitoring, staging and deployment.

Separate: Payments, chat, real-time features, maps, store publication and specialist compliance are separate.

Delivery: 3–6 weeks after commissioning and kickoff.

Full package details

Included

  • Accounts and login
  • Database using Cloudflare D1 or Supabase, plus an admin area
  • 3–5 screens
  • Error monitoring and a staging environment
  • Source code and deployment

Not included

  • Payments: €600–€1,200 excl. VAT (€714–€1,428 incl. 19% VAT)
  • Chat, real-time features and maps
  • Store publication
  • Compliance beyond basic GDPR considerations

Store app · iOS + Android

€4,000–€12,000 excl. VAT €4,760–€14,280 incl. 19% VAT

Scope: One iOS/Android codebase, store listing, screenshots, submission and source code.

Separate: Platform fees, review waiting times and backend features beyond the MVP package are separate.

Delivery: 4–8 weeks after commissioning and kickoff, plus Apple/Google review time.

Full package details

Included

  • Flutter, React Native or Capacitor
  • iOS and Android
  • Store copy, screenshots, privacy information and submission
  • Source code

Not included

  • Developer account and platform fees: paid directly by you
  • Store review waiting times: controlled by Apple/Google
  • Backend functionality beyond the MVP package

Web app / SaaS MVP

€5,000–€15,000 excl. VAT €5,950–€17,850 incl. 19% VAT

Scope: Login, roles, Stripe billing, admin, email, documentation and deployment, plus two weeks of bug fixing.

Separate: SSO, multi-tenancy, SLAs, audits and ongoing hosting/service costs are separate.

Delivery: 4–8 weeks after commissioning and kickoff.

Full package details

Included

  • Login, roles and Stripe billing
  • Admin area, email delivery and documentation
  • Deployment and two weeks of bug fixing after launch
  • Source code

Not included

  • Enterprise features: SSO, multi-tenancy, SLAs and audits
  • Ongoing hosting and service fees: on your accounts

Prices include both the amount excluding VAT and the consumer price including VAT. Domain, hosting, platform fees and licences are additional where applicable. Full pricing and delivery conditions.

Payment and rights at a glance

  • 30% on commissioning as a deposit, 70% only after full completion and your acceptance of the agreed scope.
  • Source code, documentation and the rights agreed in the proposal are handed over after full payment.
  • Changes only at your request: estimated in advance, €85 excl. VAT (€101.15 incl. 19% VAT) per hour or as a new fixed-price package.
  • Third-party costs such as store fees, hosting, domain and licences are not included in the fixed price. The respective providers bill them separately.

Working together

Efficient development. Human review.

AI helps with repetitive work so more of the effort goes into your product. Our developers plan, implement and review the result. Founder Samuel Rogers coordinates your project and remains your contact, in English or German.

Typical projects & technical approach
  • A calculator, checklist or form-to-PDF tool
  • An MVP with accounts and a database
  • An iOS and Android app from one codebase
  • An internal tool that replaces a shared spreadsheet

App Start includes one workflow with local data storage. Accounts, a backend, payments and store publication are separate. We choose web, Android or iOS around the intended use and agree the limits before you commission the work.

How we work: seven steps from inquiry to handover

  1. Form

    5 minutes

    Project type, scope, existing material, timeline and budget, with specific questions.

  2. Concept + fixed price

    within 12 business hours, 48 above €25,000 net¹

    Our understanding in our own words, what is included and what is not, the price excluding and including VAT, schedule, assumptions and open questions.

  3. Approval & deposit

    30%

    You confirm the proposal in text form; the deposit reserves your slot. Consumers receive the information on the right of withdrawal beforehand.

  4. Start

    On request: start on the next business day²

    Kick-off meeting (30 minutes), access and content, then work begins; without the rush option, within the period stated in the proposal.

  5. Sprint demos

    every week

    After each sprint (a short work cycle), a test version for you to try. Intermediate versions are for your feedback and do not trigger another instalment.

  6. Acceptance

    10 business days to review

    You check the completed result against the agreed scope and declare acceptance in text form. The final payment of 70% is due only after full completion and your acceptance.

  7. Source code & rights

    on full payment

    Repository, access and build instructions; exclusive usage rights to everything created individually for you, and a perpetual non-exclusive right to use our templates and tools (such as the design system) for your project. Third-party components such as open-source libraries keep their own licences. You are not tied to us. After that, we fix deviations from the accepted scope under the warranty (2 years for consumers, 1 year for businesses); updates, new operating system, store or browser versions and extensions are maintenance, a development budget or a new order. For consumers, the mandatory statutory rules for digital products (sections 327 ff. of the German Civil Code) also apply, for example on updates. If a service is to deviate from them, we agree this expressly and separately in the proposal.

Response times, requirements & exceptions
  1. You receive a concept within 12 business hours, or 48 business hours where the estimated project scope exceeds €25,000 excluding VAT. This also applies to complex projects. Time counts after a complete inquiry arrives through our form, Monday–Friday, 08:00–20:00 Europe/Berlin. Outside this window it starts at 08:00 on the next working day; public holidays at our company location in Starnberg, Bavaria, do not count. The concept sets out scope, approach, cost range and open questions. Clearly defined work includes a fixed-price proposal. If existing code, online multiplayer or sensitive data first require an audit or detailed concept phase, the concept identifies those steps and their proposal; a reliable implementation price follows that review. The inquiry is non-binding.
  2. Project start on the next working day after order confirmation and receipt of the 30% deposit, subject to capacity confirmed in our offer. Rush surcharge: 20%, at least €200 excluding VAT (€238 including VAT). For consumers, work before the end of the withdrawal period requires your express consent.
What to prepare
  • The core workflow and the people who will use it
  • Your logo and colours, if available
  • Apple/Google developer accounts if store publication is needed
  • Time to try test versions and give feedback

App development costs explained (German)

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