Your next conference needs an app. You could commission a custom build, use an event app builder or choose the app included with your event platform. All three may cover the programme, attendee profiles and meeting schedules. The bigger differences tend to emerge after the first version is ready.
Picture the budget discussion a few months before the event. Marketing wants a branded icon in the App Store. IT has a developer who could build it. Finance wants to know who will maintain it and what it will cost in year two. That last question is a useful place to start.
This guide compares the three routes, their development and running costs, and the practical implications of app store rules and downloads. A custom app deserves consideration when it has a lasting role or requirements standard products cannot meet. For a single event, start by checking how much work an existing solution can take off your team’s hands.
Three routes to an event app
“Build or buy” sounds like two options. In practice there are three, and they differ less in features than in who owns the code, who maintains it and whether your attendees have to download anything.
| Route | What it is | Time to first version | Cost pattern | Who maintains it | Download needed? |
|---|---|---|---|---|---|
| Build your own | Custom native app for iOS and Android, by an agency or your own developers | Months | One off project plus yearly maintenance | You | Yes, from both app stores |
| Event app builder | No-code or white label builder that publishes a branded app from templates | Days to weeks | Subscription or fee per event | The vendor maintains the builder; you maintain content and store accounts | Usually yes, sometimes also a web version |
| Platform app | The attendee app included in your registration or matchmaking platform, often a web app | Ready with the platform | Part of the platform licence | The vendor | Often no, it runs in the browser |
Check two details early in a vendor conversation: whose name appears on the store listing, and whether attendees need to install anything. Neither is obvious from a polished demo. First, let’s look at the cost of commissioning your own app.
What it really costs to build your own event app
The first cost is the build itself. Clutch, which collects project data from reviewed development agencies, puts the average app development project at $90,780 in its September 2026 pricing guide, with most projects falling between $10,000 and $49,999. An event app with a programme, attendee profiles, meeting booking and push notifications sits closer to the average than to the cheap end, because each of those features needs a backend, not just screens.
The second cost is the one your finance director will ask about. Business of Apps puts the accepted industry range for maintaining software at 15 to 25 per cent of the original development cost every year. For a $90,000 app, that is $13,500 to $22,500 a year before you add a single new feature. Store accounts add small but recurring items: the Apple Developer Program costs 99 US dollars per membership year, Google Play charges a one time registration fee of 25 US dollars.
The cost of owning an app
The costs continue after launch
Maintenance is not optional, even if your content stays the same. From 31 August 2026, Google requires new apps and updates on Google Play to target Android 16, and existing apps that fall too far behind stop being available to new users on newer devices. An app that nobody touched since last year’s conference may simply not install on an attendee’s new phone this year.
Compare those running costs with likely usage. An app for a three-day conference might see two busy weeks around the event, including preparation and follow-up. Maintenance and hosting still need funding for the rest of the year. That can be worthwhile, but it belongs in the budget from the start.
Event app builders: faster, but check whose name is on the store listing
An event app builder gives you existing modules to configure: programme, speakers, exhibitors and maps, with your own colours and logo. That removes much of the custom development work. Tixify, for example, advertises setup in an afternoon and pricing from 99 euros per month after launch (vendor information). Check how much setup assistance and support a quote includes.
The catch lies in the app stores’ rules. Apple’s App Review Guidelines, section 4.2.6, state that apps created from a commercialised template or app generation service will be rejected unless they are submitted directly by the provider of the app’s content. In plain terms: a builder cannot publish your branded event app under its own account. There are two ways around it, and each has a consequence.
- Your own developer accounts: the app is published under your name, which is what most builders now do. Tixify, for example, asks customers to bring their own Apple Developer Program membership and Google Play Console account. You own the listing, and with it the renewals, the store review and the account administration.
- The container app: Apple explicitly allows a single app that hosts many clients, “an event app with separate entries for each client event”. Your attendees then download the vendor’s app and find your event inside it. That is quicker and cheaper, but the icon on the phone is not yours.
Allow time for publication even when the app is quick to configure. Apple says it reviews 90 per cent of submissions in less than 24 hours on average. You still need room for questions or corrections, so avoid leaving the first submission until the week before the event.
The download is the hidden cost
Any option that requires installation raises another question: will attendees download it? In an April 2026 survey of 476 smartphone users, Clutch found that 45 per cent download apps only when they really need them. Another 18 per cent resist downloads, especially when the same task is possible in a browser. Of those who had been required to download an app, 72 per cent were at least mildly annoyed.
Think of an external guest at your one-day partner summit. She has the registration email, a busy calendar and several apps left over from earlier events. The benefit of installing another needs to be clear. Event app vendor Nunify reports adoption of 20 to 30 per cent without promotion, and 55 to 65 per cent as a good result with active promotion. Our five tips to market your event app can help. Making the first steps easier also gives more guests a chance to explore profiles and book meetings.
This is why the technical question between native app and web app belongs in the build or buy decision rather than after it. A web app runs in the browser from a link or a QR code, with nothing to install. Since iOS 16.4, web apps added to the home screen can also send push notifications on iPhones, which removes one of the oldest arguments for a native app. Native apps keep real advantages, such as full offline access and deeper device features; we weigh them in detail in web apps vs. native event apps. For a one off event, fewer steps win.
When building your own event app is the right call
A custom app can be a good investment when it serves a lasting purpose or meets requirements standard products cannot cover. Consider it in these situations:
- The app is used all year: an association that runs its member directory, its annual congress and its regional meetings through one app has a product, not an event tool.
- You have a product team, not just a developer: someone must own the roadmap, the operating system updates and the store listing for years, not weeks.
- Your data lives in your own systems: if ticketing, CRM (customer relationship management) and access control are in house and must be tightly connected, a custom app may be simpler than stitching a vendor product onto them.
- Offline use is critical: very large trade fairs with weak hall networks may need data stored on the device, which is still easier in a native app.
- The app is part of the brand experience: a festival or consumer show whose audience returns every year may treat the app as a product in its own right.
If several of these points apply, compare a custom build with a tailored platform in more detail. Our guide to the two types of event platforms explores that choice. For a single event without unusual technical requirements, an existing product is usually the sensible starting point.
Five questions that settle the decision
The five questions below turn the thesis into a checklist. Answer them before the first vendor demo, and write the answers down for your finance director, because they explain the budget line better than any feature list.
Build or buy
Five questions before you commission an event app
- Question 1 How many days a year is the app used? Two weeks around one event points to buying. Daily use by members all year can justify building.
- Question 2 Who maintains it in year two? Name a person or a budget for updates, store accounts and operating system changes. If nobody comes to mind, do not build.
- Question 3 Must attendees download anything? Every install step loses people. For one off events with external guests, a browser based app usually reaches more of them.
- Question 4 Where does the data live? Programme, profiles and meetings should come from the same source as registration, or you will maintain them twice.
- Question 5 Whose name is on the store listing? Own developer accounts mean your icon and your admin work. A container app means less work but the vendor's icon.
Question four is the one most often skipped, and it causes the most work later. An app that is not connected to your registration data needs its own attendee list, its own profiles and its own updates when a session moves. It also adds another place where personal data is stored, which matters for your data protection review; our GDPR checklist for event software covers what to ask under the EU General Data Protection Regulation. The fewer systems hold the same data, the fewer late evenings your team spends synchronising them.
Converve provides a branded event website and mobile web app using the same data as registration and B2B matchmaking. Attendees open a link or QR code in their browser to find the programme, profiles and meeting schedule. Push notifications can flag changes and upcoming meetings; on iPhones, the home-screen requirement described above applies. Converve does not publish native apps with your own App Store listing. You can see how the event website and app work together on our platform page.
Frequently asked questions
What is an event app builder?
An event app builder is a no-code or white label tool that lets organisers create a branded event app from templates, with modules such as programme, speakers, exhibitors, maps and notifications, without writing code. Depending on the vendor, the result is a native app under the organiser’s own store accounts, an entry inside the vendor’s container app, a web app, or a combination.
How much does it cost to build a custom event app?
Clutch puts the average app development project at $90,780 (September 2026), with most projects between $10,000 and $49,999. On top of that, plan 15 to 25 per cent of the build cost per year for maintenance (Business of Apps), plus 99 US dollars per year for the Apple Developer Program and a one time 25 US dollars for Google Play.
Can I publish an event app from a template in the App Store?
Only under conditions. Apple’s App Review Guideline 4.2.6 rejects apps from commercial templates or app generators unless they are submitted by the provider of the content, meaning you as the organiser with your own developer account. Alternatively, the vendor can publish one container app with a separate entry for each client event.
Do attendees need to download an event app?
Not necessarily. Web apps run in the browser and can be opened from a link or QR code, and since iOS 16.4 they can send push notifications once added to the home screen. Downloads cost participation: in a 2026 Clutch survey, 18 per cent of smartphone users resisted downloading apps altogether.
Is a web app enough for a conference?
For most one to three day conferences and B2B events, yes: programme, profiles, meeting schedules and notifications all work in a web app. A native app is worth considering when attendees need full offline access in large halls or when the app is used all year, for example by an association.
How long does it take to build an event app?
A custom native app usually takes several months from specification to store approval. App builders and platform apps can be ready in days to weeks, because the software already exists and only needs configuring. Apple reviews about 90 per cent of submissions within 24 hours, so the store review is rarely the delay.
Conclusion: own the app only if it outlives the event
Compare the options over their full working life. A custom build brings ongoing development and store administration; a builder may still require your own developer accounts; a platform app needs to cover the tasks your event depends on. Then consider the attendee’s first few minutes: how easily can they find the programme and their meetings?
Once you have agreed expected usage, maintenance responsibilities and running costs, the decision becomes easier to explain. To see an event app that opens without a download and shares its data with registration and matchmaking, get in touch with Converve.
