Our mobile app development company in Berlin (Silicon Allee) serves the full stack — Native iOS (Swift/SwiftUI), Native Android (Kotlin/Jetpack Compose), React Native and Flutter cross-platform. Apple Developer + Google Play Console account setup, App Store + Google Play publishing, payment integration (Stripe DE, Klarna, Sofort, Giropay, SEPA Direct Debit, PayPal, Apple Pay, Google Pay, paydirekt), Firebase Analytics + push notifications, offline mode, biometric login, dark mode — all standard. Fixed price, 12-month warranty, full source code handed over. GDPR + BSI IT-Grundschutz compliant, hosted in AWS Frankfurt or Hetzner.
Technologies & Platforms We Work With
What We Build
From Apple Developer + Google Play Console account setup to App Store publishing, from push notifications to in-app payments — everything in one package. GDPR compliant, hosted in Frankfurt.
iPhone + iPad compatible, iOS 15+ support. Modern UI with SwiftUI, reactive flow with Combine. 100% compliant with App Store guidelines — first-submit approval guaranteed. Live Activities, App Clips, Apple Pay, Sign in with Apple integrated.
Android 8+ support, Material You 3.0 theme, 40% faster development with Jetpack Compose. Google Play Console, in-app billing, FCM push notifications, Google Pay integrated.
One codebase, two platforms — 50% cost savings. React Native (Expo + bare workflow) or Flutter Material/Cupertino. Native modules bridged when needed. Ideal for MVPs and B2B apps.
NestJS / Node.js REST or GraphQL API. PostgreSQL + Redis. AWS Frankfurt / Hetzner Nuremberg / IONOS deploy. Firebase Realtime DB + Functions as option. Real-time via WebSocket. GDPR Data Processing Agreement (DPA) included.
Clickable prototype in Figma, compliant with Apple Human Interface + Material Design. Dark mode, dynamic type, accessibility (VoiceOver/TalkBack, BFSG-compliant from 2025) standard. Animation: Lottie + Rive integrated.
Apple Developer account setup (€99/yr), Google Play Console setup (€25 one-time). App icon, screenshots, ASO description, privacy policy (GDPR-compliant), imprint, T&Cs, JuSchG age rating — all included. Free revision if rejected.
Real Mobile Apps
Each live on App Store + Google Play. References from Berlin, Munich, Frankfurt shared during discovery call.
B2C e-commerce company from Hamburg. Web + iOS + Android fed from one backend, orders from Amazon DE, Otto, Zalando and Kaufland flow centrally. Stripe + Klarna + PayPal + Apple Pay. 38% higher cart conversion via push notifications.
Restaurant chain with 14 locations in Berlin and Brandenburg. Guest scans QR, downloads iOS/Android app, orders from table. Kitchen tablet auto-updates, Lieferando orders flow straight to kitchen. DATEV export for TSE-compliant POS data.
Medical practice network with 6 sites in NRW. Patients book appointments via app, view results, eRezept, eAU. TI-Konnektor + KIM mail + gematik login integrated. GDPR-compliant hosting in AWS Frankfurt. iOS + Android.
SHK (plumbing/HVAC) large operator from Munich (180 technicians). Dispatch assigns jobs mobile, technician logs hours, materials, photo protocol on-site. Live route optimization. DATEV payroll export incl. SOKA-Bau filings. Offline mode for sites without signal.
Tax advisory firm from Frankfurt. Clients photograph receipts, app OCRs them, DATEV Unternehmen online API uploads automatically. UStVA preparation, ELSTER interface. iOS + Android, biometric login, GDPR-compliant.
Wholesale B2B company from Düsseldorf — 240 dealers. Dealer browses catalog in mobile app, adds to cart, places order → flows automatically into SAP B1 → XRechnung + DHL/DPD shipping triggered. Customer-specific price lists and tier conditions.
How We Work
Fixed price, fixed timeframe. Apple approval (1-3 days) and Google Play (hours) included. Free revision if rejected. Meetings remote or in person in Berlin/Munich/Frankfurt.
We discuss your business (60-90 min, remote or on-site in Berlin/Munich/Frankfurt). Target user, 3 main screens, native or cross-platform, which integrations (payment, map, push, biometrics, DATEV, SAP) get clarified. Within 3 business days you receive a fixed-price quote module by module.
Clickable prototype in Figma. Compliant with Apple Human Interface + Material Design 3.0. Dark mode, dynamic type, BFSG accessibility. You review each screen and approve. GDPR Processing Register (VVT) and DPA prepared.
Native approach: two teams parallel (Swift + Kotlin). Cross-platform: React Native / Flutter single codebase. 40% faster code with Cursor + AI tooling. Each week a build lands on TestFlight + Firebase App Distribution — you test on your phone.
NestJS backend, PostgreSQL DB, AWS Frankfurt / Hetzner deploy. Payments (Stripe/Klarna/Sofort/Giropay/SEPA/PayPal/paydirekt SDK), push (OneSignal/Firebase), analytics (Firebase/Mixpanel/Matomo), crash (Sentry). UAT testing with your team.
Apple Developer account (€99/yr) and Google Play Console (€25 one-time) set up in your name. App icon, screenshots, ASO description, privacy policy, imprint, T&Cs, JuSchG age rating — all prepared. iOS approval 1-3 days, Android 2-8 hours.
12 months free bug-fix warranty. iOS/Android SDK updates (iOS 18, Android 15) included. 24/7 crash monitoring. New feature requests in monthly sprints. Maintenance optional: €720/mo (8 hrs) up to €4,800/mo (60 hrs), ad-hoc €130/hr.
Local marketplaces, carriers, payment methods and compliance frameworks — from a single panel
A organik gıda ihracatçısı in München
"GmbH kuruluşundan 6 ay sonra Amazon.de'de top 100 satıcı oldu"
Custom Quote
No off-the-shelf pricing. We listen to your needs, clarify the screens, and within 3 business days deliver a fixed-price + fixed-time quote. Call is free, no commitment, your idea stays protected (NDA signed). Prices in EUR excl. 19% VAT.
Regardless of scope, the following is standard — no surcharge.
Bring these — we'll deliver the right quote in 60 minutes.
Native (Swift + Kotlin): Highest performance + access to Apple/Google's newest features (e.g. Live Activity, App Clips, Material You). Recommended for: games, AR, video editors, projects with 1M+ users. Cross-platform (React Native / Flutter): 50% cheaper + one codebase + 2x faster development. Recommended for: MVPs, e-commerce, B2B, content apps. We advise based on your scenario during discovery.
Google Play: 2-8 hours after submission (usually live same day). Apple App Store: 1-3 business days after submission (Apple App Review). Account setup included: Apple Developer Program (€99/yr) and Google Play Console (€25 one-time). Account in your name or your GmbH/UG, ownership 100% yours. Free revision if rejected.
Standard: GDPR + BSI IT-Grundschutz + TMG compliant. We deliver Processing Register (VVT), Data Processing Agreement (DPA), privacy policy, cookie/tracking banner (TTDSG-compliant). Hosting in AWS Frankfurt or Hetzner Nuremberg — data does not leave the EU. For banking apps: KRITIS-compliant. For age-restricted apps: JuSchG age rating prepared. From 2025: BFSG accessibility + e-Invoice XRechnung/ZUGFeRD mandatory — both standard with us.
No cause for concern. 23 of our last 24 apps approved on first submit. We know Apple's 4.0 (Design), 5.1 (Privacy), 2.5 (Performance) guidelines by heart. If rejected: free revision (if our code bug) or add-on module quote (if content policy violation). Guaranteed.
The code is 100% yours. GitHub repository handed over free. You can switch to another mobile app developer or hire in-house. App Store and Google Play accounts also opened in your name or your GmbH — ownership 100% yours. Vendor lock-in is not our model.
Every project gets a senior mobile app developer assigned (min. 5 years iOS/Android experience). Our 12-year Berlin team includes developers who worked at SAP, Zalando, Delivery Hero, N26 and similar large companies. Juniors work under code review — the senior is responsible for output. We introduce your assigned developer during the discovery call.
Part of the standard package: OneSignal/Firebase push, Stripe/Klarna/Sofort/Giropay/SEPA/PayPal/paydirekt + Apple Pay + Google Pay, Firebase Analytics + Matomo (GDPR-compliant), Sentry crash, biometric login. Additional integrations (DATEV, SAP B1, TI-Konnektor/KIM, DHL/DPD, Zendesk, Intercom, MapKit/Google Maps, ARKit/ARCore) become part of scope — no surcharge.
Three options: (1) Shared backend — web + mobile fed from one API, what gets added to cart on web appears on mobile. Most common. (2) Web-view hybrid — on tight budgets parts of the mobile app show web pages (Apple doesn't love this, needs care). (3) Completely new mobile — mobile-specific UX, synced with web via API. We recommend based on scenario during discovery.
Building mobile apps for Germany follows different rules than building for the US or Turkey. App Store DE storefront optimisation, Apple Pay/Google Pay support across Sparkasse and Volksbank cards, DSGVO/TTDSG consent that runs in parallel with Apple's ATT framework, push-notification opt-in obligations under UWG and PSD2 integrations with the Sparkassen-Finanzgruppe and Genossenschaftliche Finanzgruppe each impose unique constraints. This guide walks through every one.
The Turkish and German App Store storefronts are entirely separate listings. Submitting without German metadata, German screenshots (with German on-image copy) and a German preview video makes your app appear only to non-DE users. Important ASO keywords include Lieferung, Bezahlen, Rechnung, Online-Shop, Apotheke, Termin and Kontoauszug. Average rating must stay above 4.2 — German consumers will not download apps below that threshold.
Apple Pay launched in Germany in 2018 with Sparkasse, Commerzbank and Deutsche Bank backing; today most Visa, Mastercard and Girocard cards are supported. Google Pay adoption on Android is comparatively low; the Sparkasse-specific S-pay companion app fills a meaningful gap. Native iOS uses PassKit and Apple Pay JS; on the backend Stripe, Adyen or Mollie act as merchant aggregators. Native Android uses Google Pay API Direct Integration or tokenisation via the Stripe Android SDK.
| Payment method | iOS support | Android support | Typical use |
|---|---|---|---|
| Apple Pay | Native (PassKit) | None | Premium DTC |
| Google Pay | Web only | Native API | Standard commerce |
| S-pay (Sparkasse) | Companion app | Companion app | Consumer invoice |
| Klarna SDK | Embedded | Embedded | Buy now pay later |
| PayPal SDK | Embedded | Embedded | Standard checkout |
| giropay (PSD2) | Webview | Webview | Older demographics |
The TTDSG (Telekommunikation-Telemedien-Datenschutzgesetz, 2021) requires a dedicated consent step for terminal-equipment access — device identifiers, IDFA, Google Advertising ID — separate from Apple's ATT prompt. On first launch your app must present a clear "Erforderlich / Alle akzeptieren / Ablehnen" set of choices; on iOS most teams show their own DSGVO banner before ATT prompts fire. Usercentrics App SDK, OneTrust App SDK and Didomi App SDK are the field-tested options.
Securing the system-level push permission is not enough in Germany. The UWG (Gesetz gegen den unlauteren Wettbewerb) treats promotional push notifications similarly to e-mail marketing, which often demands a documented double opt-in for marketing messages — discounts, campaigns, sale alerts. Transactional pushes (order status, appointments) sit outside this scope. Segment Firebase Cloud Messaging into "Transactional" and "Marketing" topics, and require an additional explicit consent for the latter.
German retail banking is dominated by the Sparkassen-Finanzgruppe (around 370 local Sparkasse) and the Volksbanken Raiffeisenbanken (around 750 cooperative banks) — a very different topology to US or Turkish markets. Apps connect via PSD2 (XS2A) REST APIs or the legacy FinTS/HBCI protocol. For balance and single payments XS2A is the modern choice; for richer analytics, FinTS still offers more depth. Aggregators such as Solaris, finleap connect, FinAPI and Klarna Kosma (formerly Tink) unify 1,500+ German banks behind a single API.
German users have low tolerance for bugs: anything below 99.7% crash-free rate in Crashlytics earns negative reviews fast. Dropping below 3 stars on App Store DE cuts organic downloads by around 60%. Combine Firebase Performance Monitoring with Sentry for indie/Mittelstand apps; Datadog Real User Monitoring is the enterprise baseline.
Several Germany-specific platforms are worth integrating with. Food and restaurant apps benefit from Lieferando (formerly Takeaway), Wolt or Flink/Gorillas quick-commerce APIs. Health apps for pharmacies (Apotheke), nursing care (Pflege) or therapy must connect to electronic-prescription (eRezept) APIs operated through the Krankenkassen (DAK, TK, Barmer). The eRezept mandate took effect in 2024 and is now universally enforced.
Germany-specific rejection causes during Apple/Google review include missing Impressum (which must be reachable from in-app settings), non-compliant DSGVO consent flow, missing BfArM (Bundesinstitut für Arzneimittel) approval for eRezept integrations, and JuSchG violations in gambling or alcohol apps. Review usually completes in 24-72 hours; on rejection, a German-speaking support team accelerates resolution.