Cwa-wishlist: Empfangszähler für Kontaktids auf der Oberfläche der Anwendung

[SchwertAs]

Feature description

Display dayly and weekly Contact-Amount of user on base of received IDs (infected or not).

I would like to have a broadly visible counter of contact Ids per day, and summed up for a week. The user can use this as personal feedback of his/her own behaviour in having various and extended contacts, which all increase the risk of infection nevertheless the contacts are infected or not. So every scan for nearby Ids should count and sum up the received Ids for a day and for the currend and the last week. This counter i call it Contact-Amount would be a measure for the amount of contacts a person has had.

So further contact regulations could demand a dayly or weekly border for this Contact-Amount for any person, depending on their professional circumstances. This could be a new way to get infections controllable and to supervise contact behaviour of the citizens.

Pseudocode:
Während eines Abfragescans:
__Wenn neuer Tag:
____setzte Tageszähler auf 0
__Wenn neue Woche:
____übertrage Wochenzähler auf Vorwochenzähler
____setze Wochenzähler auf 0
__Für jede empfangene Id (neu oder bekannt ist egal)
____erhöhe aktuellen Wochenzähler
____erhöhe aktuellen Tageszähler
__Zeige neuen Tageszähler an
__Zeige neuen Wochenzähler an
__Zeige Vorwochenzähler an

Problem and motivation

Mit dieser Zählweise bildet man eine generelle RIsikozahl, die sowohl Kontaktdauer, als auch Anzahl der Kontakte beinhaltet. Diese kann für den User ein wertvolles Feedback sein, wie hoch sein persönliches Risiko aufgrund seines eigenen Verhaltens bereits gestiegen ist. Durch Vorweisen einer entsprechend niedrigen Contact-Amount Zahl gegenüber Anderen ließe sich vorbildliches Verhalten und damit Vertrauen in verantwortliches Verhalten aufbauen.

Is this something you're interested in working on

Yes

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Internal Tracking ID: EXPOSUREAPP-4056

[Ein-Tim]

Just a small remark:
The number of non positive contacts is not revealed by the ENF (the underlying API from Apple/Google).
Also CWA does never touch RPIs or similar things, this is all done by the ENF...
But since this is the Wishlist this Issue should definitely stay open, since I also think this is a good request 👍

---

Related Issue: #205 & #124

@SchwertAs This is also nearly a duplicate of #5, so maybe also take a look there 👍

[dl1chb]

For me this counter could also act as a technical feedback: I do not know if everyone here has the app when going to the supermarked. I also cannot proof everything here is somehow working. So for me it would have the advantage to see, okay, it sees others using the app or it does not. Or even nobody else is using the app. Then I can see how much I can trust this "low risk" statement. Or maybe there is another way to do this (would be another feature request then). I honestly don't believe I never came in contact with no infected person during these days...

I am against having this as a proof of good behaviour. Sometimes I need food and need to go to the supermarked. Also there are people who cannot avoid contacts during their work (think for example of those who are working in supermarkets). Therefor it should need some passphrase to see this number.

[heinezen]

Related: #262

[heinezen]

Hello @SchwertAs ,

Thank you for the request. We have submitted your proposal to our internal Jira system (ticket ID: EXPOSUREAPP-4056) and forwarded it to the development team. The developers and the RKI will now decide if this feature can be implemented and how it would work with the other related requests. We will notify everyone on Github when we have something new to report about the status of the request.

Best Regards,
CH

---

Corona-Warn-App Open Source Team

[SchwertAs]

You did misunderstand my suggestion. I wanted to sum up ALL Contacts not only the positive ones.

Von: Ein_Tim [e-mail]
Gesendet: Freitag, 27. November 2020 07:57
An: corona-warn-app/cwa-wishlist [e-mail]
Cc: SchwertAs [e-mail]; Author [e-mail]
Betreff: Re: [corona-warn-app/cwa-wishlist] Empfangszähler für Kontaktids auf der Oberfläche der Anwendung (#280)

Just a small remark:
The number of non positive contacts is not revealed by the ENF (the underlying API from Apple/Google).
But since this is the Wishlist.

---

Related: #205 https://github.com/corona-warn-app/cwa-wishlist/issues/205

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[SchwertAs]

It would be sufficient to delay the counter display by a randomly time of some minutes to ensure this.

Von: jucktnich [e-mail]
Gesendet: Freitag, 27. November 2020 17:11
An: corona-warn-app/cwa-wishlist [e-mail]
Cc: SchwertAs [e-mail]; Author [e-mail]
Betreff: Re: [corona-warn-app/cwa-wishlist] Empfangszähler für Kontaktids auf der Oberfläche der Anwendung (#280)

If it would go live (I don't think so, because of the ENF) the counter should NOT be live, it should get updated every day, because there will be cries out of the media, because you see whether or not a person use the app and they'll think the voluntary of the app is affected.

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[Ein-Tim]

You did misunderstand my suggestion. I wanted to sum up ALL Contacts not only the positive ones.

Yes I understood you @SchwertAs, but inside the ENF this is not possible because the Corona-Warn App only knows about the positive encounters, how many (or if you had) non-positive encounters is only known by the ENF, which does not tell this number to CWA.

[SchwertAs]

I f ENF does not tell maybe there is a way to ask it?

Von: Ein_Tim [e-mail]
Gesendet: Montag, 30. November 2020 08:38
An: corona-warn-app/cwa-wishlist [e-mail]
Cc: SchwertAs [e-mail]; Mention [e-mail]
Betreff: Re: [corona-warn-app/cwa-wishlist] Empfangszähler für Kontaktids auf der Oberfläche der Anwendung (#280)

Yeah IK @SchwertAs https://github.com/SchwertAs , but inside the ENF this is not possible because the Corona-Warn App only knows about the positive encounters, how many (or if you had) non-positive encounters is only known by the ENF, which does not tell this number to CWA.

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[Ein-Tim]

I f ENF does not tell maybe there is a way to ask it?

No, it's not that easy. The ENF (Exposure Notification Framework) is developed by Apple & Google and also maintained by them.
The German Corona-Warn App is _talking_ to it to get the information you see in the App.
There is some information which is _told_ to CWA by ENF, but is not shown to the user (for privacy reasons).
How many contacts (positive+negative encounters) the phone recorded is not even _told_ to CWA by ENF.
So for your proposal Apple/Google would have to update the ENF.

But since this is the Wishlist, this can stay open, I just wanted to clarify that this is at the moment not possible to introduce.

[Ein-Tim]

The next versions will contain some statistics (https://github.com/corona-warn-app/cwa-app-ios/pull/1807 & https://github.com/corona-warn-app/cwa-app-android/pull/2043).