Mobile apps, explained plainly

Celestial Infosoft is a software company. This site lists the 27 Android and iPhone apps we work on and publishes 54 short guides about the topics they cover.

Browse all apps

Browse by topic

• Phone calls and messages2 apps
• Alarms and clocks2 apps
• Calendar and planning1 apps
• Cycle tracking2 apps
• Video and media1 apps
• Home security cameras1 apps
• Crypto mining simulators13 apps
• UK benefits information1 apps
• US payments information1 apps
• Guias de Mexico (IMSS y CFE)2 apps
• Loans and EMI1 apps
• Scams and phone safety3 guide
• For app owners and publishers3 guide
• Business data and lead lists1 guide

Timely guides

• Clocks go back in 2026: dates, what your phone does and how to protect your alarms
• Unpaid toll and parcel text scams in 2026: how they work and what to do
• Black Friday 2026 scam checklist: fake shops, fake delivery texts and card traps
• Cybersecurity Awareness Month: 10 phone habits that stop most attacks
• Google Play's Android 16 (API 36) deadline: what app owners must do in 2026
• Android developer verification in 2026: what changes for users and app publishers

Popular guides

• How to block spam calls on Android
• Alarm not ringing on Android? 8 fixes that work
• How Bitcoin mining actually works
• How EMI is calculated: formula, worked example and flat vs reducing rates
• Cloud mining scam red flags: 10 warning signs
• How period tracker apps work, and what they cannot do

All 54 guides →

Apps

• Alarm ClockGoogle Play
• Alarm Clock & Loud AlarmGoogle Play
• All Video Downloader - VideoGoGoogle Play
• Bluma Period Cycle TrackerApp Store
• Bluma: Period & Cycle TrackerGoogle Play
• BTC Cloud Miner Crypto MiningGoogle Play
• BTC Cloud Miner SimulatorApp Store
• BTC Cloud Mining SimulatorGoogle Play
• BTC Crypto Mining SimulatorGoogle Play
• BTC Mining Cloud SimApp Store
• BTC Mining Cloud SimGoogle Play
• Calendar AI - Smart PlannerGoogle Play

See all 27 apps →