iSafeCharge+ vs Houstudia Calculator
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
iSafeCharge+
Transform your device into a robust anti-theft alarm. It alerts you if your phone is moved or unplugged while charging. Features include intruder photos and adjustable sensitivity for maximum security.
- Motion detection alarm
- Charger unplug alert
- Intruder photo capture
- Adjustable sensitivity
- Force max volume siren
- Background protection
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**iSafeCharge - Phone Security Alarm** • Turn your iPhone into a powerful anti-theft alarm. Whether you're charging at a café, studying at the library, or just keeping your phone safe at home – iSafeCharge has you covered. ** Three Protection Modes:** • Motion Detection – Alerts you when someone picks up or moves your phone • Cable Detection – Triggers if someone unplugs your charger (also detects power outages!) • Both – Maximum protection with motion AND cable monitoring **Smart Features:** • Intruder Photos – Automatically captures photos when someone unlocks your phone to stop the alarm • Adjustable Sensitivity – Fine-tune motion detection to prevent false alarms • Force Max Volume – Siren plays at full volume even if your phone is muted • Works in Background – Protection continues even when screen is locked • Battery Indicator – See your charge level at a glance **Perfect For:** • Charging in public places • Protecting your phone on your desk • Monitoring power outages overnight • Catching nosy friends or family! * Simple to use: just tap ARM and walk away. Only you can stop it by unlocking your phone.
Houstudia Calculator
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Experience calculating reimagined! Houstudia Calculator solves expressions in real-time as you type, with an intuitive memory system that makes complex calculations effortless. Key Features: Live Results - Watch your calculations solve instantly as you type Smart Memory - Tap any answer to store it, then tap again to reuse it in new expressions Multi-Calculator Tabs - Switch between four color-coded calculators to work on different problems simultaneously without losing your work No More Clearing - Calculate tips, multiply numbers, and find square roots all while keeping your previous results visible Perfect for students, engineers, and anyone who needs a calculator that works as fast as they think!
Screenshots
Verdict
The clearest difference is in-app purchases: Houstudia Calculator at none against iSafeCharge+'s 1. Houstudia Calculator also leads on iOS requirement (15.1 vs 17.6). iSafeCharge+'s advantage is update cadence (monthly vs every 2 months). On price, ads and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. iSafeCharge+ sells 1 one-off in-app purchase. Houstudia Calculator asks for nothing beyond the download.
iSafeCharge+ ships an update monthly, Houstudia Calculator every 2 months. The most recent releases landed on October 14, 2026 and October 17, 2026 respectively.
| Parameter | iSafeCharge+ | Houstudia Calculator |
|---|---|---|
| Price | Free | Free |
| Rating | 4.3 (77 ratings) — better | — |
| Positive reviews | 53.4% of reviews | — |
| Number of ratings | 77 — better | — |
| Update frequency | Monthly — better | Every 2 months |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad | iPhone, iPod |
| Requires iOS | 17.6 | 15.1 — better |
| Further details — not scored | ||
| Size | 17 MB | 20 MB |
| Age rating | 4+ | 12+ |
| Developer | App4Life Sweden AB | Houstudia |
Bugs and requests
iSafeCharge+
Reported bugs
14 issues- Motion sensor not working when phone is locked
- Alarm continues to ring even after closing the app
- Alarm cannot be turned off without shutting down the phone
- Motion sensor does not trigger alarm when phone is locked
- Alarm does not stop when cable is re-plugged
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- Alarm can be muted by pressing volume buttons
- App does not work with Apple battery cases
- Alarm can be bypassed by opening the camera and recording a video
- Alarm can be turned off by lowering the volume
- Motion sensor function is unresponsive
- Alarm continues to sound after unplugging the cable
- Alarm cannot be stopped by swiping
- App makes fraudulent charges without consent
- App collects user data (www google com, app-measurement, googleads doubleclick)
Requested features
14 requests- Allow changing alarm volume
- Add sound for full charge
- Add voice control for alarm
- Add option for calmer alarm sounds
- Add a passcode or other method to turn off alarm
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- Add timer until fully charged
- Add light and dark mode
- Add different alarm settings
- Add manual safe charge setting
- Add option to start app automatically when charger is connected
- Display battery percentage
- Upgrade logo
- Add instruction manual
- Disable volume controls when phone is locked
Houstudia Calculator
Not enough reviews yet to summarise bugs or requests.
In-app purchases
iSafeCharge+
- Remove ads$0.99
Houstudia Calculator
No in-app purchases
Questions
Is iSafeCharge+ free?
Is Houstudia Calculator free?
Do iSafeCharge+ or Houstudia Calculator have ads?
Which is updated more often, iSafeCharge+ or Houstudia Calculator?
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