Comparison

SOSLight vs Smart Unit Converter Plus

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

SOSLight

Features
Read full description

Turn your phone into a Morse code beacon. SOSLight blinks your flashlight (or full-screen white light) in international Morse code so rescuers, hikers, and sailors can spot your signal in the dark. When the power is out, when you are off-grid, or when you simply need to be seen — tap a preset and let the light do the talking. KEY FEATURES • Plain flashlight mode — one tap for instant, steady light • Built-in emergency presets — SOS, HELP, FIRE, MAYDAY, CQD, SOS-PAN, recognized worldwide • Custom messages — type any phrase and it is converted to Morse automatically • Infinite loop playback — keeps signaling until rescuers arrive • Automatic fallback — uses the screen as a beacon on devices without a torch • 100% on-device — no network, no account, no ads, no tracking WHO IT IS FOR • Hikers, climbers, sailors, and night cyclists who need a visible distress signal • Anyone preparing for power outages, earthquakes, or natural disasters • Students and hobbyists learning Morse code • Outdoor enthusiasts who want a dependable signal light PRIVACY SOSLight does not access your camera images, photos, location, or network. The only permission it requests is flashlight (torch) control, and nothing is collected, stored, or transmitted off the device. Emergencies do not announce themselves. Keep SOSLight on your home screen and call for help with light when seconds matter.

About

Smart Unit Converter Plus

Features
Read full description

Smart Unit Converter Plus Smart Unit Converter Plus is a powerful and easy-to-use unit conversion app designed for everyday life, education, engineering, science, and professional work. Convert instantly between thousands of units across more than 90 categories, including length, weight, temperature, area, volume, speed, pressure, energy, electrical units, data storage, currency, cooking, typography, and many more. Features • Supports 90+ conversion categories • Thousands of units with accurate calculations • Real-time conversion results • Metric and Imperial systems • Currency converter • Scientific and engineering units • Favorites and recent conversions • Works completely offline • Clean and modern interface • Optimized for both iPhone and iPad Whether you're a student, engineer, traveler, technician, or simply need quick conversions, Smart Unit Converter Plus provides fast and reliable results anytime.

Screenshots

SOSLight3 screens
Smart Unit Converter Plus3 screens

Verdict

The call

The clearest difference is ads: Smart Unit Converter Plus at none against SOSLight's shown. Smart Unit Converter Plus also leads on device support (3 vs 1) and iOS requirement (15.0 vs 26.0). On price and in-app purchases there is nothing between them.

Scored on Price Ā· Rating Ā· Positive reviews Ā· Number of ratings Ā· Update frequency Ā· Ads Ā· In-app purchases Ā· Monetization Ā· Best chart rank Ā· Devices Ā· Requires iOS

CostPrice Ā· In-app purchases Ā· Ads Ā· Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Scorecard3 real differences Ā· 2 level
SOSLight versus Smart Unit Converter Plus: the parameters behind the verdict, then further details
ParameterSOSLightSmart Unit Converter Plus
PriceFreeFree
AdsYesNo — better
In-app purchasesNoNo
DevicesiPhoneiPhone, iPad, iPod — better
Requires iOS26.015.0 — better
Further details — not scored
Size2 MB22 MB
Age rating4+4+
Developerheewook shin海彬 唐

In-app purchases

None

SOSLight

No in-app purchases

None

Smart Unit Converter Plus

No in-app purchases

Questions

Is SOSLight free?
SOSLight is free to download, with no in-app purchases.
Is Smart Unit Converter Plus free?
Smart Unit Converter Plus is free to download, with no in-app purchases.
Do SOSLight or Smart Unit Converter Plus have ads?
SOSLight shows ads; Smart Unit Converter Plus does not.

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