Comparison

Calculee vs TerraWarn

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

Head to head
About

Calculee

Features
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The most realistic Calculator! The neumorphic design brings it to the 3D dimension and the haptics makes you feel every gentle press of a key ... The unique and rich color palette will allow you to personalize your iPhone and iPad and make it perfect for your office, home... and even your watch or bag. In addition, you can choose the shape of the buttons: from the classic square to the circle. The calculator is one of the most used tools and it doesn't have to be boring! Depending on your mood, it can be snow-white, red, yellow, black and even... lavender. Download Calculee and make your world look more colorful!

About

TerraWarn

Features
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TerraWarn helps you stay informed about natural hazards and prepare for emergencies with hazard alerts, interactive maps, preparedness tools, emergency resources, and safety guidance. IMPORTANT DISCLAIMER TerraWarn is an independent application. It is NOT affiliated with, endorsed by, authorized by, or operated by any government, government agency, emergency service, or public authority. TerraWarn does not represent a government entity and is not a government service. Information is provided for informational and educational purposes only. It does not replace official emergency alerts, instructions from authorities, professional medical advice, or emergency services. In an emergency, contact local emergency services and follow official instructions. SOURCES OF INFORMATION TerraWarn uses information obtained or adapted from these publicly available sources: โ€ข U.S. Geological Survey (USGS) โ€” Earthquakes https://earthquake.usgs.gov/ โ€ข NASA EONET โ€” Natural events https://eonet.gsfc.nasa.gov/ โ€ข Global Disaster Alert and Coordination System (GDACS) โ€” Disaster alerts https://www.gdacs.org/ โ€ข U.S. Centers for Disease Control and Prevention (CDC) โ€” Health & emergency preparedness https://www.cdc.gov/ โ€ข American Red Cross โ€” First aid & preparedness https://www.redcross.org/ โ€ข Ready.gov (U.S. Department of Homeland Security) โ€” Hazard safety & preparedness https://www.ready.gov/ โ€ข AirNow.gov (U.S. Environmental Protection Agency) โ€” Air quality & wildfire smoke https://www.airnow.gov/ โ€ข OpenStreetMap โ€” Map data and nearby-facility locations (hospitals, pharmacies, fire and police stations) https://www.openstreetmap.org/ Consult the original sources and relevant local authorities for authoritative and current information. HAZARD ALERTS View supported events including earthquakes, wildfires, floods, storms, volcanic activity, and other natural hazards. Choose the hazards you want to follow and configure available severity preferences. INTERACTIVE HAZARD MAP Explore supported hazard events on a map and view available details such as location, magnitude, depth, affected area, and event information. Where available, access the corresponding original source. EMERGENCY CONTACTS Quickly access emergency calling features and contact information. Emergency numbers vary by country and region and should be verified with local authorities. EMERGENCY GUIDES Access general safety information for earthquakes, floods, wildfires, hurricanes, severe storms, tornadoes, volcanic events, and other supported hazards. Guidance is based on the sources listed above and does not replace official instructions. FIRST AID & MEDICAL GUIDES Access general information about CPR, severe bleeding, burns, choking, stroke, heart attack, seizures, poisoning, and broken bones. Relevant content is based on publicly available American Red Cross and CDC guidance. Medical information is educational only and does not replace professional medical training, diagnosis, treatment, or emergency medical care. PREPAREDNESS Create emergency checklists and track essential supplies such as water, food, first-aid items, flashlights, radios, and important documents. MEDICAL PROFILE Store emergency information you choose to enter, including blood type, allergies, medications, and medical notes. This organizational feature does not provide diagnosis or treatment. NEARBY HELP Use location-based features to find supported nearby hospitals, pharmacies, fire stations, police stations, and other facilities, sourced from OpenStreetMap. Always verify critical information during an emergency. PRIVACY No account is required. Location is used when needed for location-based features such as nearby hazards and facilities. TerraWarn is an independent informational and preparedness app, NOT a government application. For authoritative emergency information, consult the original sources above and follow instructions from local authorities.

Screenshots

Calculee4 screens
TerraWarn4 screens

Verdict

The call

The clearest difference is price: TerraWarn at Free against Calculee's $2.99. TerraWarn also leads on in-app purchases (none vs 1) and update cadence (every 2 weeks vs every 5 weeks). Calculee's advantage is ads (none vs shown) and iOS requirement (14.3 vs 16.4). On device support there is nothing between them.

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

CostPrice ยท In-app purchases ยท Ads ยท Monetization

TerraWarn is free to download; Calculee costs $2.99 up front. Calculee sells 1 one-off in-app purchase. TerraWarn asks for nothing beyond the download.

UpkeepUpdate frequency

Calculee ships an update every 5 weeks, TerraWarn every 2 weeks. The most recent releases landed on November 3, 2026 and November 5, 2026 respectively.

Scorecard5 real differences ยท 1 level
Calculee versus TerraWarn: the parameters behind the verdict, then further details
ParameterCalculeeTerraWarn
Price$2.99Free โ€” better
Update frequencyEvery 5 weeksEvery 2 weeks โ€” better
AdsNo โ€” betterYes
In-app purchasesYesNo โ€” better
DevicesiPhone, iPad, iPod โ€” betteriPhone, iPad
Requires iOS14.3 โ€” better16.4
Further details โ€” not scored
Size1 MB54 MB
Age rating4+4+
DeveloperMikolaj Adamowiczmohamed oumaalla

In-app purchases

1 purchases

Calculee

One-time1
  • Premium Colors$0.99
None

TerraWarn

No in-app purchases

Questions

Is Calculee free?
Calculee costs $2.99, and also offers in-app purchases.
Is TerraWarn free?
TerraWarn is free to download, with no in-app purchases.
Do Calculee or TerraWarn have ads?
TerraWarn shows ads; Calculee does not.
Which is updated more often, Calculee or TerraWarn?
Calculee ships an update every 5 weeks, and TerraWarn every 2 weeks. Most recently, Calculee was updated on November 3, 2026 and TerraWarn on November 5, 2026.

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