Smart Backpack Privacy Policy

Smart Backpack / Pametni ranac · LIGHT BRIDGE GROUP DOO

Last updated: 15 October 2026

The short version. Smart Backpack keeps everything on your child's phone. It has no permission to use the internet at all, so it cannot send anything anywhere — that is enforced by Android, not promised by us. There is no account, no sign-up, no advertising, no analytics and no tracking of any kind. We do not receive your child's data because the app has no way to send it.

1. Who this is about

This policy covers the Android application Smart Backpack (in Serbian, Pametni ranac), package name rs.lbgroup.elenainora, published by LIGHT BRIDGE GROUP DOO.

Questions: support@lbgroup.rs

2. What we collect

Nothing. We operate no server for this app, receive no data from it, and have no account system, no identifier and no profile for any user.

Everything the student enters — timetable, homework, tests, marks, notes, drawings, reminders, progress — is written to the app's private storage on the device and stays there.

3. The internet claim, and how to check it

The app does not hold android.permission.INTERNET. On Android this is not a policy but a hard limit: without that permission the operating system refuses every network call the app could attempt. Anyone can verify it from the published package:

aapt2 dump permissions base.apk

The complete list of permissions the app holds is:

Permission	What it is for
`POST_NOTIFICATIONS`	To show reminders. Asked for when the student first switches reminders on, never at launch.
`RECEIVE_BOOT_COMPLETED`	So a reminder survives the phone restarting. Android forgets scheduled alarms on a reboot; this lets the app put its own back, and grants access to nothing.
`WAKE_LOCK`	Added by Android's own scheduling library so a reminder can finish its work.
`rs.lbgroup.elenainora.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION`	A permission the app defines for itself, added automatically by Android's AndroidX libraries. It grants nothing to anybody: its only purpose is to stop other apps on the phone from receiving the app's internal messages. It is listed here because the command above will show it, and a list that called itself complete should not leave anything out.

There is no location permission, no camera permission, no contacts permission, no microphone permission and no external-storage permission.

Android's own cloud backup is switched off as well. The app is built with allowBackup="false", and both cloud backup and device-to-device transfer are excluded by rule, so your child's homework, notes, marks and drawings are not copied to Google Drive and are not carried across to a new phone by Android's transfer tool. The only copy that exists anywhere is the one on the phone, plus any backup file a person exports deliberately (see section 6).

4. What the app does not contain

No advertising and no advertising SDK.
No analytics, no crash reporting, no attribution or measurement SDK.
No social-network login or sharing SDK.
No artificial-intelligence service and no model that sends text anywhere.
No in-app purchases and no payment of any kind.
No advertising identifier, device identifier or fingerprinting.

5. Notifications

Reminders are created and shown entirely on the device. They are written to be uninteresting to anyone reading a lock screen over a shoulder: the bag reminder says it is time to pack a bag and at most lists tomorrow's subjects, and no notification ever contains a mark, a grade, or anything about how the student is doing.

A reminder the student writes themselves shows their own words, because that is the point of it. The app adds nothing to the text.

To be exact about what can appear on a locked screen: a homework reminder names the subject and the title the student gave that piece of work (“Maths: fractions worksheet — due tomorrow”), and a test reminder names the test the same way. That is the student's own wording too, and it is there because a reminder that does not say what it is about is no use. What never appears is a mark, a grade, an average, or anything about how the student is doing — none of the app's notifications so much as read that part of the database.

Reminder sounds are played by Android from its own notification channels, not by the app. A family can change or silence any of them in the phone's settings, and the app cannot override that.

6. When data leaves the device — only if you choose

The app can export a backup file containing the student's own entries. This happens only when a person taps the export button and chooses where to put the file, through Android's own file picker. The app does not upload it, cannot upload it, and does not see where it goes. What happens to that file afterwards is outside the app and outside our control.

Attachments (photos and files added to homework or notes) are not included in an export.

7. Deleting everything

Settings → Data and storage → Delete all my data permanently removes the database and every attached file from the phone. Uninstalling the app also removes all of it. Because we hold nothing, there is nothing for you to ask us to delete — but if you want that confirmed in writing, write to support@lbgroup.rs.

8. Children

This app is made for primary-school children and is built privacy-first for that reason: no account, no network, no identifiers, no profiling, no behavioural data, and no mechanism by which a child could be contacted by anyone through the app.

9. Changes to this policy

If the app's behaviour changes, this page changes with it and the date at the top is updated. The app's own About screen always states the version installed.

10. Contact

LIGHT BRIDGE GROUP DOO
lbgroup.rs
support@lbgroup.rs

Ukratko. Pametni ranac čuva sve na telefonu vašeg deteta. Aplikacija uopšte nema dozvolu za korišćenje interneta, pa ništa ne može nigde da pošalje — to obezbeđuje Android, a ne naše obećanje. Nema naloga, nema registracije, nema reklama, nema analitike i nema praćenja bilo koje vrste. Mi ne dobijamo podatke vašeg deteta jer aplikacija nema način da ih pošalje.

1. Na šta se ovo odnosi

Ova politika se odnosi na Android aplikaciju Pametni ranac (na engleskom Smart Backpack), naziv paketa rs.lbgroup.elenainora, izdavač LIGHT BRIDGE GROUP DOO.

Pitanja: support@lbgroup.rs

2. Šta prikupljamo

Ništa. Za ovu aplikaciju ne držimo nijedan server, ne primamo nikakve podatke iz nje i nemamo sistem naloga, identifikator niti profil bilo kog korisnika.

Sve što učenik unese — raspored, domaći, kontrolni, ocene, beleške, crteži, podsetnici, napredak — upisuje se u privatni prostor aplikacije na uređaju i tu ostaje.

3. Tvrdnja o internetu i kako je proveriti

Aplikacija nema dozvolu android.permission.INTERNET. Na Androidu to nije obećanje nego tvrdo ograničenje: bez te dozvole operativni sistem odbija svaki mrežni poziv koji bi aplikacija mogla da pokuša. Svako to može proveriti iz objavljenog paketa:

aapt2 dump permissions base.apk

Potpun spisak dozvola koje aplikacija ima:

Dozvola	Čemu služi
`POST_NOTIFICATIONS`	Za prikaz podsetnika. Traži se kada učenik prvi put uključi podsetnike, nikada pri pokretanju.
`RECEIVE_BOOT_COMPLETED`	Da podsetnik preživi ponovno pokretanje telefona. Android zaboravlja zakazane alarme pri restartu; ovo omogućava aplikaciji da vrati svoje, i ne daje pristup ničemu drugom.
`WAKE_LOCK`	Dodaje je Androidova sopstvena biblioteka za zakazivanje, da bi podsetnik mogao da završi posao.
`rs.lbgroup.elenainora.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION`	Dozvola koju aplikacija definiše sama za sebe, a dodaju je Androidove AndroidX biblioteke. Nikome ne daje nikakav pristup: jedina svrha joj je da spreči druge aplikacije na telefonu da primaju interne poruke ove aplikacije. Navedena je zato što će je gornja komanda prikazati, a spisak koji sebe naziva potpunim ne bi smeo ništa da izostavi.

Nema dozvole za lokaciju, kameru, kontakte, mikrofon ni spoljnu memoriju.

I Androidova sopstvena rezervna kopija u oblaku je isključena. Aplikacija je napravljena sa allowBackup="false", a pravilima su isključeni i rezervna kopija u oblaku i prenos sa uređaja na uređaj — pa se domaći zadaci, beleške, ocene i crteži vašeg deteta ne kopiraju na Google Drive i Androidova alatka za prenos ih ne prenosi na novi telefon. Jedina kopija koja igde postoji je ona na telefonu, uz eventualnu rezervnu datoteku koju neko namerno izveze (vidi odeljak 6).

4. Šta aplikacija ne sadrži

Nema reklama ni reklamnog SDK-a.
Nema analitike, prijave grešaka ni SDK-a za merenje.
Nema prijave preko društvenih mreža ni SDK-a za deljenje.
Nema servisa veštačke inteligencije ni modela koji bilo šta šalje.
Nema kupovine u aplikaciji ni bilo kakvog plaćanja.
Nema reklamnog identifikatora, identifikatora uređaja ni otiska uređaja.

5. Obaveštenja

Podsetnici se prave i prikazuju u potpunosti na uređaju. Napisani su tako da nikome ko preko ramena gleda zaključan ekran ne znače ništa: podsetnik za ranac kaže da je vreme da se spakuje ranac i najviše navodi sutrašnje predmete, a nijedno obaveštenje nikada ne sadrži ocenu niti bilo šta o tome kako učenik napreduje.

Podsetnik koji učenik sam napiše prikazuje njegove sopstvene reči, jer je to i smisao podsetnika. Aplikacija tekstu ništa ne dodaje.

Da budemo precizni o tome šta može da se pojavi na zaključanom ekranu: podsetnik za domaći navodi predmet i naslov koji je učenik dao tom zadatku („Matematika: vežbanka o razlomcima — rok je sutra“), a podsetnik za test navodi test na isti način. I to su sopstvene reči učenika, a tu su zato što podsetnik koji ne kaže na šta se odnosi nema svrhu. Ono što se nikada ne pojavljuje jeste ocena, prosek ni bilo šta o tome kako učenik napreduje — nijedno obaveštenje aplikacije taj deo baze čak i ne čita.

Zvuk podsetnika pušta Android sa svojih kanala obaveštenja, a ne aplikacija. Porodica može svaki od njih da promeni ili utiša u podešavanjima telefona, i aplikacija to ne može da poništi.

6. Kada podaci napuštaju uređaj — samo ako vi to izaberete

Aplikacija može da izveze rezervnu kopiju sa unosima učenika. To se dešava samo kada neko pritisne dugme za izvoz i izabere gde da smesti datoteku, kroz Androidov sopstveni birač datoteka. Aplikacija je ne šalje, ne može da je pošalje i ne vidi gde ona ide. Šta se sa tom datotekom dalje dešava je van aplikacije i van naše kontrole.

Prilozi (slike i datoteke dodate domaćim zadacima ili beleškama) nisu deo izvoza.

7. Brisanje svega

Podešavanja → Podaci i memorija → Obriši sve moje podatke trajno uklanja bazu i svaku priloženu datoteku sa telefona. Deinstaliranje aplikacije takođe uklanja sve. Pošto mi ništa ne čuvamo, nema ničega što biste mogli da tražite da obrišemo — ali ako želite to potvrđeno pismeno, pišite na support@lbgroup.rs.

8. Deca

Aplikacija je namenjena deci osnovnoškolskog uzrasta i zato je građena tako da privatnost bude prva: bez naloga, bez mreže, bez identifikatora, bez profilisanja, bez podataka o ponašanju i bez ikakvog načina da neko preko aplikacije stupi u kontakt sa detetom.

9. Izmene ove politike

Ako se ponašanje aplikacije promeni, menja se i ova stranica, a datum na vrhu se ažurira. Ekran „O aplikaciji“ uvek prikazuje instaliranu verziju.

10. Kontakt