Partner content: this article is about Zyntra School, part of Zyntra OS by Double Support — a company owned by the brother of Sources Fast's owner. Product details come from Double Support's own pages.
Fingerprint, card and face devices at the school gate promise attendance without roll calls. The risk is that a device that misses a student marks them absent, and an angry parent calls the school. The fix isn't a better device — it's better rules.
Rule 1: devices mark presence, never absence
In Zyntra School, the first punch of the day marks a student present — or late after the cutoff. But devices never mark anyone absent. A missing punch just means the teacher's mark decides.
Rule 2: the teacher has the last word
Teacher marks override device data. If a student came in through a side door, the teacher records them present and that's what counts.
Rule 3: unknown punches aren't guessed
If a device sends an ID the system doesn't recognise, it's kept as "not matched" rather than assigned to someone at random. The office can review and fix them.
Rule 4: closed days stay closed
Closing a day locks it. Reopening needs its own permission and a reason, which is logged. Device data can't change a closed day either. This protects the record you'll later use for reports and certificates.
Rule 5: offline devices still count
Some devices can't send data live. Their exported attendance files can be imported instead.
Staff too
The same gate devices can serve staff: staff punches go to HR attendance, which feeds payroll.
Daily or per-period attendance
Schools take attendance differently. Zyntra School supports daily attendance by section, or per period where the school uses that model.
Telling parents
- E-mail notices for absences, and approved WhatsApp templates where configured — at most once a day, so parents aren't flooded.
- The portal shows each child's attendance percentage and any non-present marks.
Reports that help
Yearly attendance, daily period-by-period views, and students below a threshold — 90% by default, and you can change it.
Before you buy devices
- Agree your cutoff time for "late".
- Decide daily or per-period attendance.
- Check how your devices export data.
- Make sure every student's device ID is matched to their file.
Common problems with gate devices
- A student taps a friend's card. Teacher marks still override the device, so the class register stays the final word.
- The device is offline in the morning. Export the device file later and import it.
- New students aren't enrolled on the device. Their punches appear as "not matched" until their ID is linked.
- Parents complain about too many messages. Absence notices go at most once a day.
See attendance in Zyntra School: double-support.com/zyntra-school.
Sources
Frequently asked questions
Which devices work?
Fingerprint, card and face devices that can send punches, or export attendance files when they can't send live.
Can a teacher change attendance after the day is closed?
Only with the separate permission to reopen a day, and the reason is logged.
Do staff and students use the same devices?
They can. Staff punches go to HR attendance.
Can we set our own attendance threshold?
Yes. The default is 90%, and you can change it.






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