App development company in Frankfurt
iOS, Android and web apps for Frankfurt companies, with security, data protection and accessibility planned in from day one. Meet us at Taunustor 1.
- Custom quote after a brief
- No sales pitch
Company-wide:★★★★★ 4.9+ on Clutch·250+ brands·10 offices
UnFoldMart is an app development company with an office at Taunustor 1, 60310 Frankfurt am Main. We design and build iOS, Android, cross-platform (Flutter, React Native) and web apps for Frankfurt companies, with GDPR, DORA documentation and accessibility planned in, from discovery to store release and support. You can meet us at our office or by video, and pricing is a custom quote after a short brief and a free 30-minute call.
Last updated:
Key facts
| Service | Mobile and web app development: iOS, Android, cross-platform (Flutter, React Native), web apps and PWAs, backend and store release |
|---|---|
| Company | UnFoldMart |
| Office | Taunustor 1, 60310 Frankfurt am Main, Germany |
| Meetings | In person at our Frankfurt office or by video |
| Languages | First call in English; project calls by video in English |
| Time zone | Central European Time (CET/CEST); project teams are led from our international offices |
| Typical timeline | Discovery 1–3 weeks · design 2–5 weeks · first version 8–16 weeks · testing and store release 1–3 weeks (ranges, not guarantees) |
| Pricing | Custom quote after a short brief: fixed-scope project or ongoing product team. No price list. |
| Booking | Free 30-minute video call ↗ |
| Company-wide | 10 offices in 10 markets · 250+ brands · 500+ projects · 4.9+ on Clutch · 8 working languages |
App development for Frankfurt companies
Frankfurt is continental Europe's leading financial centre, home to the European Central Bank and the Frankfurt Stock Exchange, and one of Europe's busiest airport and logistics hubs. Apps here have to meet high expectations on security, reliability and data protection.
Frankfurt at a glance
- IndustriesBanking, insurance, logistics, consulting, health, SaaS
- Data lawGDPR, Germany's BDSG and, for financial firms, DORA
- PaymentsPayPal, invoice, SEPA direct debit, cards, wallets
- LanguagesGerman and English
- Time zoneCET in winter, CEST in summer
Banks, fintechs and insurers
Customer, onboarding and advisor apps built for strict security reviews.
Logistics and mobility
Tracking, driver and warehouse apps that work on the move.
B2B and professional services
Client portals and internal tools for teams across offices.
What our Frankfurt app developers build
iOS and Android app development, Flutter and React Native apps, web apps and the secure backend behind them.
iOS and Android apps
Swift and Kotlin, full device access.
Cross-platform apps
One React Native or Flutter codebase.
Web apps and PWAs
Portals and tools, no store needed.
Backend, APIs and integrations
Accounts, payments, CRM, ERP.
MVPs and first versions
Test your idea with real users.
Takeover and support
Review, fixes, upgrades, rebuilds.
Native, cross-platform or web app?
Native iOS app development in Swift, Android in Kotlin, or one Flutter or React Native codebase. We recommend one in discovery.
| Native | Cross-platform | Web app / PWA | |
|---|---|---|---|
| Code | Swift (iOS) and Kotlin (Android) | One codebase: Flutter or React Native | One codebase: TypeScript, React |
| Performance and device features | Best; full device access | Very good for most apps | Good; limited device access |
| Time to both stores | Longest: two apps | Usually faster | No store needed |
| Best for | Demanding, device-heavy apps | Most business and consumer apps | Portals and internal tools |
Apps we can build
Common app types; illustrative screens, not client work.
Booking and scheduling
Pick a slot, pay, get reminders.
Shop and loyalty app
Browse, buy, collect points.
Customer portal
Orders and documents, one login.
Field-service tool
Jobs and checklists on site.
Marketplace
Two sides meet and book.
Finance dashboard
Balances and reports at a glance.
- Chat assistant
- Smart search
- Document reading
- Recommendations
How we work
From brief to store release, with a working build at every stage.
- 1BriefScope and quote
- 2PrototypeClickable design
- 3SprintsDemo every two weeks
- 4Store releaseApp Store · Google Play
Timeline
| Phase | Typical duration | You get |
|---|---|---|
| Discovery and scope | 1 to 3 weeks | Written scope and quote |
| UX and UI design | 2 to 5 weeks | Clickable prototype |
| Build in sprints | 8 to 16 weeks for a first version | Test build every sprint |
| Testing and store release | 1 to 3 weeks | Real-device and security testing, store submission |
| Support and next versions | Ongoing, as agreed | Monitoring, updates, next versions |
Typical ranges in weeks, not a guarantee.
How to choose an app development company in Frankfurt
Six checks before you sign, whoever you hire.
Platform fit
Ask which approach they recommend (native, Flutter, React Native or web) and why.
UnFoldMart: We recommend one in discovery.
A written scope and quote
What is in, what is out, and how changes are priced.
UnFoldMart: Scope, timeline and price in writing.
A visible process
A clickable prototype first, then demos and test builds you can install.
UnFoldMart: A demo after every two-week sprint.
Security and data protection
How data is protected and tested before release.
UnFoldMart: OWASP MASVS, security testing before launch.
Store release and ownership
Who submits to the App Store and Google Play, and who holds the accounts and code.
UnFoldMart: App Store and Google Play submission is part of our release step.
Support after launch
Updates for new iOS and Android versions, monitoring and a clean handover option.
UnFoldMart: Support agreed in your quote.
Agency, freelancer or in-house team?
| App agency | Freelancer | In-house team | |
|---|---|---|---|
| Skills | Design, build, testing and release in one team | Usually one specialism | The roles you hire |
| Start | After scope and quote | Often quick | After hiring |
| Continuity | Team covers absences and handover | Depends on one person | High while the team stays |
| Your management effort | Low to medium | Medium to high | High |
| Cost model | Project quote or monthly team | Hourly or daily rate | Salaries, hiring and tools |
| Best for | A full app, start to finish | A defined, smaller task | A long-term core product |
What affects the cost
No price list. Your quote depends on these factors.
- PlatformsiOS, Android, web.
- Screens and featuresHow many, how complex.
- IntegrationsPayments, CRM, ERP.
- Design depthStandard or custom.
- TimelineYour launch date.
- Regulatory reviewsDORA documentation and security reviews for financial clients add time.
Ways to work with us
Fixed-scope project
Scope and price in writing.
Ongoing product team
A dedicated team, monthly.
Discovery first
A scope you can use anywhere.
How quoting works
- Short briefWhat and for whom.
- Free 30-minute callBy video, in English.
- Written estimateScope, timeline, price.
- You decideNo obligation.
GDPR, DORA and accessibility
This is general information, not legal advice. Your legal adviser has the final word.
GDPR and the BDSG
The GDPR and Germany's Federal Data Protection Act (BDSG) set the rules for personal data. We plan consent, data minimisation and deletion into every app.
Official source: BDSG (gesetze-im-internet.de) ↗DORA
The EU's Digital Operational Resilience Act has applied since 17 January 2025. It sets ICT risk rules for banks, insurers and other financial entities, including for their ICT suppliers. We document our part for your review.
Official source: DORA (EUR-Lex) ↗Accessibility (BFSG)
Since 28 June 2025, Germany's Accessibility Strengthening Act (BFSG), which implements the European Accessibility Act, sets accessibility requirements for many consumer services, such as e-commerce and consumer banking, including their apps. We design and test against WCAG 2.2.
Official source: BFSG (gesetze-im-internet.de) ↗Public standards we align our work to
Working with us from Frankfurt
One dedicated team; projects are led by UnFoldMart from our international offices.
Our Frankfurt office
Taunustor 1, 60310 Frankfurt am Main
In person or by video
Meet the team at our office or talk by video.
Language
Calls and project work in English.
Time zone: Central European Time (CET/CEST)
Office-hours overlap: –
09:00–18:00 local time in both offices. Same time zone as our Amsterdam, Zürich, Paris, Madrid and Warsaw offices.
Company-wide figures across all our services, not app projects.
- Zürich · in person
- Frankfurt · in person
- London
- Amsterdam
- Paris
- Madrid
- Warsaw
- Singapore
- Vancouver
- Gurugram
Frequently asked questions
App development in Frankfurt: before you book a call.
Do you have an office in Frankfurt?
Yes. UnFoldMart's Frankfurt office is at Taunustor 1, 60310 Frankfurt am Main. You can meet the team there in person or talk by video.
How much does it cost to build an app in Frankfurt?
Pricing is custom. Cost depends on platforms, screens and features, integrations, design depth, compliance needs and your timeline. After a short brief and a free 30-minute call, you get a written estimate.
How long does it take to build an app?
Typically: discovery 1 to 3 weeks, design 2 to 5 weeks, build 8 to 16 weeks for a first version, testing and store release 1 to 3 weeks. These are ranges, not guarantees.
Should we build a native app or use Flutter or React Native?
Native (Swift for iOS, Kotlin for Android) suits top performance and deep device features. Cross-platform (Flutter or React Native) shares one codebase and usually reaches both stores faster. We recommend one in discovery.
Do you build apps for banks and fintechs in Frankfurt?
Yes, we build customer and internal apps for financial companies. Security testing runs before every release, and we document how we handle data and access so your risk and compliance teams can review it, for example under DORA.
Does our app have to be accessible under the BFSG?
If your app is part of a consumer service covered by the BFSG, such as e-commerce or consumer banking, accessibility requirements have applied since 28 June 2025. We design and test against WCAG 2.2; your legal adviser confirms whether the law applies to you.
Can you connect the payment methods German customers use?
Yes. German customers often expect PayPal, purchase on invoice, SEPA direct debit, cards and wallets. We connect the methods your payment provider supports.
Which language do we work in?
The free first call on this page is in English; our German page offers the first call in German. During the project we talk by video in English, and you can also meet us at Taunustor 1.
Can you take over an existing app?
Yes. We start with a review of the code, the store listings and the backend, then fix, upgrade or rebuild in steps, so your app stays available.
Can you add AI features to our app?
Yes, for example a chat assistant, smart search, document reading or recommendations, built in with your data under control. See our AI agent development service for more.
Building an app in Frankfurt?
Tell us what you want to build; the quote follows in writing.