BLE or QR for session tracking?
Which approach fits your congress.
QR codes record a check-in event. BLE beacons record continuous presence. For a simple attendance list, the difference rarely matters. For CME and CPD compliance, it is the difference between data that satisfies an accreditation body and data that does not. Here is how to decide which one your congress actually needs.
If you need to prove how long attendees stayed, you need BLE. If you need to know they arrived, QR is enough.
You need CME or CPD compliance documentation, want continuous presence data across all sessions, or are running a large congress where asking attendees to scan at every door is operationally impractical.
A basic session attendance record is sufficient, compliance requirements are simple, your budget is limited, or the event is small enough that scan-at-door is operationally manageable.
Your accreditation body has specific documentation requirements and you are unsure whether QR check-in meets them. We have set up both approaches across medical and corporate congresses.
BLE vs. QR session tracking, compared.
The dimensions that matter when choosing between the two approaches.
| Dimension | BLE beacons | QR codes |
|---|---|---|
| Attendance method | Passive (automatic) | Active (scan required) |
| Data captured | Continuous presence | Entry event only |
| CME / CPD compliance | Strong | Often insufficient |
| Attendee friction | None | Per session |
| Hardware needed | Beacons + badge tags | Scanners or phones |
| Setup complexity | Higher | Lower |
| Data granularity | High (time in session) | Basic (attended / not) |
| Cost | Higher | Lower |
Not sure which your congress needs? We assess your compliance requirements and recommend accordingly.
What BLE and QR actually do.
BLE beacon tracking
Passive presence data
Beacons are placed throughout session rooms and corridors. Each attendee badge carries a small BLE tag. As the attendee moves through the venue, beacons detect the badge continuously and log its presence. The system builds a movement record across all sessions without the attendee doing anything: no scan, no app open, no action required. The data shows when the attendee entered a room, how long they stayed, and when they left.
- → Medical congresses with CME accreditation
- → Events needing presence duration documentation
- → Large venues where scan-at-door creates queues
QR code check-in
Active entry recording
Each attendee has a QR code on their badge or in an event app. At the entrance to each session room, a staff member or self-service scanner reads the code. The system logs an entry event: this attendee arrived at this session at this time. It is a reliable, low-cost attendance record. The limitation is that it captures only entry. If an attendee leaves after 10 minutes, that is not recorded. For many events, that does not matter. For CME, it often does.
- → Corporate events with basic attendance needs
- → Events where budget is the primary constraint
- → Smaller congresses with manageable session room count
Why CME accreditation changes the decision.
Most CME and CPD accreditation bodies require evidence of sustained attendance, not just session entry. The standard for many European and international congresses is that an attendee must be present for a minimum percentage of a session, typically 80 percent, to qualify for credit. A QR scan at the door proves they entered. It does not prove they stayed.
BLE tracking provides the time-stamped presence log that satisfies this requirement. The beacon system records when the badge entered the room and when it left, giving you duration data per attendee per session. This is what accreditation bodies can audit.
We work with Crowd Connected for BLE-based session tracking. The setup involves placing beacons at session room entrances and at key positions within larger rooms to handle coverage. Attendee badges are produced with embedded BLE tags. The Crowd Connected platform aggregates the data and delivers session-level attendance reports.
The beacon infrastructure can often share the same badge as the registration QR code, so attendees carry one badge that handles both venue check-in and passive session tracking. For a 1,500-person medical congress with 15 simultaneous sessions, this approach eliminates queues at every room door while capturing compliant attendance data automatically.
We use BLE where it is needed. We use QR where it is enough.
Our session tracking work covers both approaches. For pharma and life sciences congresses with CME requirements, BLE is almost always the right call. For corporate events where the goal is a session attendance list for internal use, QR check-in is faster to set up, cheaper, and delivers everything the event actually needs.
We do not recommend BLE to clients who do not need it. The cost and setup overhead only makes sense when the compliance requirement justifies it. We assess that in our initial briefing before any kit is ordered.
Review session tracking optionsBLE vs. QR session tracking: common questions
Can QR codes meet CME or CPD compliance requirements?
QR codes record a check-in event: the attendee was present at a session at a specific time. For many CME bodies, that is not sufficient evidence of sustained attendance. BLE tracking logs continuous presence data throughout a session, which allows you to demonstrate how long an attendee stayed. Accreditation bodies increasingly require this level of documentation, particularly for longer sessions.
How many beacons does a congress typically need?
It depends on the venue and session room sizes. A typical congress with 10 to 20 session rooms might use 30 to 60 beacons, placed at entry points and within larger rooms for coverage accuracy. The infrastructure scales with the event. We plan beacon placement for each venue as part of our session tracking service.
Does BLE tracking require attendees to take any action?
No. BLE tracking is passive. Attendees wear a badge fitted with a BLE tag; beacons in each room detect the badge as the attendee moves through the venue. There is no scan, no login, no phone required. This is a significant practical advantage for large congresses where asking every attendee to scan at every session door creates friction and queues.
Which platform do you use for BLE session tracking?
We work primarily with Crowd Connected for BLE-based session tracking. Crowd Connected provides the beacon infrastructure, badge tags and analytics platform, and integrates with registration and event app data. We manage the full setup, from venue planning to post-event reporting.
Is QR session tracking ever the right choice?
Yes. For events where a simple attendance record is all that is needed, where compliance requirements are basic, and where setup budget is limited, QR check-in is often the right call. It is fast to set up, requires minimal hardware and works reliably. The limitation is that it captures entry events, not presence duration.
Can the same badge be used for registration check-in and BLE session tracking?
Yes. In most setups, the badge serves both purposes. The registration QR code or barcode handles check-in at the venue entrance; the embedded BLE tag handles passive session tracking throughout the congress. This is the most common configuration for medical congresses that need both entry control and CME-grade attendance documentation.
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