A custom EV charging app for your drivers, your fleet or your charging network. From starting and paying for charging sessions to fleet dashboards with cost per session, OCPP and OCPI integrations, and smart charging. For CPOs, EMSPs, fleet owners and property managers who want more than a white-label app.
The charging-point market runs on a handful of open standards: OCPP for communication between charger and backend, OCPI for roaming between networks, ISO 15118 for Plug & Charge, and eRoaming hubs such as Hubject and OICP. A good charging app touches all of these layers at once, and it also has to be easy to use for a driver who just wants to press a button.
We have been building that layer for years. For fleet owners with dozens of electric vans, for housing associations with a few hundred parking spaces, for CPOs who want to operate their own charging network, and for property managers who want to neatly organise charging at office and retail car parks. Almost always in combination with fleet management software and a robust IoT backend for charger telemetry.
What we keep seeing: a white-label app from a hardware supplier gets you part of the way, but falls short once you connect a second charger type, want your own tariff structure, or need fleet flows specific to your business. Custom development is then not about the technology, but about the combination of flows: your own brand, your own contracts, your own integrations with lease agreements or energy procurement.
OCPP 1.6J and 2.0.1: the standard between charger and backend. 1.6 runs on most of the Dutch fleet, while 2.0.1 is needed for Plug & Charge and advanced smart charging. We build backends that support both versions in parallel and ensure a clean upgrade path per charger type.
OCPI 2.2 is the open peer-to-peer standard for roaming between networks, so a charging card from one provider works on another provider's charge point. We implement both the eMSP side (the card provider calling a foreign charge point) and the CPO side (the charge point owner accepting someone else's card).
ISO 15118 Plug & Charge: the vehicle authorises itself at the charger using certificates, so no card or app is needed. Great for user experience, but it requires careful PKI implementation and integration with OEM back-ends.
Hubject (OICP) and GIREVE: eRoaming hubs that provide wide coverage without you having to sign separate contracts with every network. Where it makes sense, we implement the Hubject and OICP connection alongside direct OCPI.
Which combination you need depends on your role in the charging chain: driver app, fleet dashboard, CPO back-end, or all three at once. In the first conversation we advise which layer should take priority.
The app that lets your end user find a charge point, start a session, pay and receive the invoice in their inbox. Includes authorisation via charging card, app token or Plug & Charge (ISO 15118), live charge point status, and recognition of business versus private charging when the car belongs to the company.
Which car charges where, how many kWh, at what tariff, and from which charge point owner? The dashboard combines OCPI roaming data, home charger sessions and public charge point sessions in one overview. Includes mileage reading, expense claim flow for the employee, and export to your accounting system or subscription billing.
For those operating their own charging network: charge point monitoring via OCPP, fault management, dynamic tariffs, billing to end users, and integrations with OCPI hubs and Hubject so that charge cards from other providers work too. For EMSPs, we mirror that pattern from the card side. Almost always combined with energy software for purchasing and grid connection management.
A charging app feels different for each audience. We build the flow around practice rather than a generic template; below are a few patterns that recur across projects.
The car belongs to the company, but the employee sometimes charges at home or privately at the weekend too. The app recognises where and when charging takes place, separates business from private use according to your policy, and produces one monthly statement that replaces the fuel card. Includes a gateway integration with the leasing company.
For homes with their own solar PV system, we charge only from surplus generation, or during low-tariff hours of a dynamic energy contract. The system takes the home's main connection capacity into account, so there is no overload if the induction hob is also on.
Employees charge at the employer's expense, while visitors pay for themselves. The app distinguishes between the two based on token or QR code, and the facilities team has a dashboard to see which charge points are occupied, manage waiting lists and allocate costs per department.
For public charging, trust is everything: customers need to know upfront what a session will cost, no matter which card or app they authorise with. We build the tariff display transparently, including roaming surcharges, in line with AFIR regulations on price communication at public charge points.
A working charging point app or charging backend, plus everything around it needed to run it in production and develop it further yourself.
With OneDayBuild, we turn your idea into something tangible in one day for €1,150, so you can see whether further development is worth the investment. Decide to go ahead with the full build? Then we credit the full cost.
Explore OneDayBuild →The EV charging chain has a handful of distinct roles. Our charging app projects usually serve one of these profiles. If you recognise yourself here, we're happy to talk through what works best in your context.
Parties that own and operate charge points, at the scale of networks such as Allego, Fastned, Vattenfall, Eneco or Greenchoice. A dedicated driver app plus an operations backend for uptime monitoring, fault management and dynamic tariffs.
Providers of charging cards and charging subscriptions that don't own charge points themselves, but use someone else's network via OCPI roaming. The app centres on cardholder flows: finding a charge point, authorising with your token, and seeing transparently what the session cost.
Top Google Search Console query for this page: scalable charging infrastructure for fleet management. We build the dashboard that shows you, per vehicle, where it charges, at which tariff, and what share is business or private, linked to your fleet management system.
For charging environments at homes or workplaces: employee versus visitor flows, feeding back from your own solar panels, load balancing per building connection, and cost allocation between tenants or employees. Includes an installer flow for the initial handover.
We map out which role you play in the charging chain, which hardware you use, which roaming partners you want to connect with, and who the end users are. From that we can define a scope we can plan.
We get the first OCPP connection working with one charger type, validate the OCPI connection with a hub, and set up the first driver flow. A working skeleton for your team to try out and give feedback on.
A working build you can test yourself every two weeks. First the happy-path flows (starting a session, paying, invoicing), then smart charging and load balancing, then roaming edge cases. The MVP goes live after a number of sprints for your first target group.
Phased rollout: a pilot location first, then scaling up. Monitoring of charger uptime, OCPP errors and payment flows. Further development based on what your drivers and operations team run into in practice.
What clients usually want to know before we start.
A free, no-obligation introductory call of half an hour. Tell us where you sit in the charging chain — CPO, eMSP, fleet or property — and which flow is causing the most trouble right now. We'll think along with you and point out where we can add value.
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