InstruChem — Privacy Policy

Last updated: June 2026 · App ID: com.outpublishing.instruchem

1. Introduction

OUT Publishing House operates InstruChem, a digital chemistry textbook app. This policy explains what we collect and how we use it. By using the app, you agree to this policy.

2. Information We Collect

Account: full name, phone number, 4-digit PIN (stored as a secure hash on our servers)
Reading: unlocked chapters, language/display preferences, login timestamps
Payments: phone number, amount, and transaction reference sent to PalmPesa when you purchase content
Device: locally stored preferences and session data on your phone
Technical: connection data (e.g. IP, device type) via our hosting providers

We do not collect GPS location, contacts, or media without your action in a specific feature.

3. How We Use Data

To manage your account, deliver book content, process payments, send in-app notices, protect against abuse, and improve the app.

4. Third-Party Services

Service	Purpose
Supabase	Authentication & database
PalmPesa	Mobile money payments
Google Play	App distribution

5. Security & Retention

We use HTTPS, hashed PINs, and access controls. We retain data while your account is active and as required by law. The app may use screen protection for paid educational content.

6. Your Rights & Children

You may request access, correction, or deletion of your data by contacting us. We do not knowingly collect data from children under 13 without parental consent.

Delete account: See our Account Deletion page for how to request deletion, what we remove, and what we may keep. In the app: Settings → Delete Account.

7. Contact

OUT Publishing House
Attn: Matobola Joel Mihale
Email: outpublishinghouse@gmail.com
Dar es Salaam, Tanzania

Imesasishwa: Juni 2026 · App ID: com.outpublishing.instruchem

1. Utangulizi

OUT Publishing House inaendesha InstruChem, programu ya kitabu cha kemia kidijitali. Sera hii inaeleza tunachokusanya na jinsi tunavyokitumia. Kwa kutumia programu, unakubali sera hii.

2. Taarifa Tunazokusanya

Akaunti: majina, simu, PIN ya tarakimu 4 (hash salama kwenye seva)
Kusoma: sura zilizofunguliwa, mapendeleo ya lugha/mwonekano, muda wa kuingia
Malipo: simu, kiasi, na namba ya muamala kwa PalmPesa unaponunua
Kifaa: mapendeleo na kikao kwenye simu yako
Kiufundi: data ya muunganisho kupitia watoa huduma wetu

3. Matumizi ya Data

Kuendesha akaunti, kutoa maudhui, kuchakata malipo, kutuma arifa, kulinda usalama, na kuboresha programu.

4. Huduma za Watu Wengine

Huduma	Kazi
Supabase	Uthibitishaji na hifadhidata
PalmPesa	Malipo ya simu
Google Play	Usambazaji wa programu

5. Usalama na Uhifadhi

Tunatumia HTTPS, PIN iliyofichwa, na udhibiti wa ufikiaji. Tunahifadhi data wakati akaunti inatumika na kisheria.

6. Haki Zako na Watoto

Unaweza kuomba kupata, kusahihisha, au kufuta data yako. Hatukusanyi data ya watoto chini ya miaka 13 bila idhini ya mzazi.

Futa akaunti: Angalia ukurasa wa Kufuta Akaunti kwa maelezo kamili. Ndani ya programu: Mipangilio → Futa Akaunti.

7. Mawasiliano

OUT Publishing House
Makini: Matobola Joel Mihale
Barua pepe: outpublishinghouse@gmail.com
Dar es Salaam, Tanzania