# BlastSim — Nuclear Fallout Calculator > Nuclear explosion fallout and affected area calculator. (iPhone/iPad app by Mapnitude Company Limited.) - Source: https://appshunter.io/ios/app/blastsim/id1441173322 (this page in markdown: same URL + `.md`) - Developer: [Mapnitude Company Limited](https://appshunter.io/developer/473558784) - Category: Reference, Education - Price: Free - Rating: 4.61/5 from 986 App Store ratings · 52 written reviews indexed - Age rating: 4+ - Requires: iOS 12.0 · 56 MB - Languages: English, French, German, Italian, Japanese, Korean, Portuguese, Russian, Chinese, Spanish and 2 more - Released: 2018-11-24 - Data updated: 2026-06-10 - Monetization: free - User reviews in markdown: https://appshunter.io/ios/app/blastsim/id1441173322/reviews.md ## What is BlastSim? What is BlastSim? BlastSim is a free app for calculation of area affected by nuclear explosion based on formulae researched by nuclear explosion archives. The software is intended for users who wish to know more about devastating effect of nuclear explosions which is useful for evacuation planning. This app makes it easy to predict possible affected areas for just a few taps. This app can be used to experiment with the range of thermal radiation, the radius of radioactive fallout and the possible number of casualties. It includes a list of popular nuclear weapons in human history such as Little Boy, Fat Man and Tsar Bomba. It is also possible to input custom yield of the weapon (in kilotons). The list of formulae/reference papers used, which can be access from the menu section in the app,are on our website. ## Key features - Nuclear explosion area calculation - Thermal radiation range prediction - Radioactive fallout radius estimation - Casualty number prediction - Pre-loaded popular nuclear weapons - Custom weapon yield input ## What do users think of BlastSim? Overall sentiment: mixed **Pros** - 👍 Great app - 🚀 Unique and interesting - 🚀 Fun to use - 🚀 Allows users to see devastation of nuclear weapons **Cons** - 🐛 Errors with casualty calculations - 🔍 Lacking necessary functionality - 🔍 Difficult to use - 🔍 Blurry map - 💰 Intrusive ads - 🔍 Glitchy and buggy **Commonly reported bugs** - Casualty counter shows 'error' - App crashes when using certain features - Search function not working properly - Bombs get stuck on 'calculating' **Most requested features** - Add ability to choose bomb type - Add mushroom cloud visualization - Add total kill count - Add bigger custom bomb option - Add radiation effects - Add air burst and surface detonation calculations ## Recent user reviews (10 of 52) All indexed reviews: https://appshunter.io/ios/app/blastsim/id1441173322/reviews.md ### 3/5 — Great App - Except for intrusive adds *2023-05-14* This is a great application. However, I find it almost unworkable because Google throws so many adds at you they either, distract your work, take over the screen, shut down the app dumping your work, or try and sell you an add blocker. There needs to be an add free version of this for a reasonable cost. - ### 5/5 — Nice but should be more immersive. *2023-04-03* What i mean by immersive i mean like when you drop the bomb theres a model of that bomb. Then the app would be better for me. ### 5/5 — best app ever *2023-01-01, version 1.8.3* i now get to defend my country’s friend and bomb north korea thx ### 4/5 — Interesting, but some errors *2022-11-05, version 1.8.1* Overall, this is a very interesting app. It is unique and really allows users to see the devastation that nuclear weapons could produce. However, I still noticed some errors, specifically with the “estimated causalities” section. When using a nuke on Hawaii, I consistently got around 3.9 million causalities as an estimate. The current population of Hawaii is only about 1.5 million. I’m not sure if the app is trying to take into account tourists, but I don’t believe there is almost 4 million people on there main island of Hawaii at one time. That was just something I noticed though. Overall, unique and interesting app. ### 3/5 — Error issue *2022-10-06, version 1.8.1* When i first got this, i liked it. Now it seems to have a major issue. I think this app was created in russia. When calculating the number of casualties for Moscow, all I get is an Data unknown error message, yet when i do the same on Washington dc i get the results on casualties. A bit one sided. ### 1/5 — Ads ads and more ads *2022-10-02, version 1.8.1* If you want a worthless spammed up app that dumps full screen ads on you. Then this is the app for you. The Idiot developer should know better. ### 1/5 — Unusual… *2022-09-10, version 1.8* if it’s called “BlastSim”, why can’t you add a “LAUNCH” button? ### 5/5 — 1 problem *2022-09-02, version 1.7.12* There is one problem that I want fixed it’s that the casualty number keeps saying error and I just want it fixed ### 1/5 — Fix *2022-08-29, version 1.7.12* When I’m trying to deploy it it keep saying error fix this please ### 3/5 — Casualties error *2022-08-21, version 1.7.12* Great app but everytime i use a weapon is says error for casualties ive uninstalled and reinstalled and it doesn’t work ## Frequently asked questions about BlastSim ### What does BlastSim do? BlastSim is a free application that calculates the area affected by a nuclear explosion. It uses researched formulae to predict the range of thermal radiation, the radius of radioactive fallout, and the potential number of casualties. This can be useful for understanding the impact of nuclear events and for evacuation planning. ### What are the key features of BlastSim? Key features include the ability to calculate the affected area, predict thermal radiation range and fallout radius, and estimate casualties. It also includes a list of historical nuclear weapons and allows users to input custom weapon yields in kilotons. ### Is BlastSim free to use? Yes, BlastSim is a free application. There are no costs associated with downloading or using its features. The app does not have in-app purchases or advertisements. ### What kind of nuclear weapons can I simulate? The app includes a list of popular nuclear weapons from history, such as Little Boy, Fat Man, and Tsar Bomba. Additionally, you have the option to input a custom yield for any weapon in kilotons to simulate its effects. ### How can BlastSim be used for evacuation planning? By simulating the potential radius of thermal radiation and radioactive fallout, users can gain an understanding of the immediate and lingering dangers from a nuclear explosion. This information can inform decisions about safe zones and evacuation routes, contributing to more effective disaster preparedness. ## Version history (last 5 releases) ### 1.8.11 — 2023-09-21 Support iOS 17 ### 1.8.10 — 2023-08-25 Framework update and bug fixes ### 1.8.9 — 2023-08-04 Framework Update and Bug Fixes ### 1.8.8 — 2023-08-03 Framework update and bug fix ### 1.8.7 — 2023-06-22 Framework update ## Apps similar to BlastSim | App | Rating | Price | Category | | --- | --- | --- | --- | | [Solar Walk Lite - Planetarium](https://appshunter.io/ios/app/solar-walk-lite-planetarium/id1176819919) | 4.6 (31,479) | Free | Reference | | [Help for Rust](https://appshunter.io/ios/app/help-for-rust/id1349080680) | 3.4 (105) | Free | Reference | | [Satellite Tracker by Star Walk](https://appshunter.io/ios/app/satellite-tracker-by-star-walk/id1248172706) | 4.6 (68,723) | Free | Reference | | [Dododex: ARK Survival Ascended](https://appshunter.io/ios/app/dododex-ark-survival-ascended/id1071311292) | 4.9 (48,737) | Free | Reference | | [Chemistry Answers](https://appshunter.io/ios/app/chemistry-answers/id1502837305) | 3.2 (37) | Free | Reference | | [Charger Master](https://appshunter.io/ios/app/charger-master/id1495536308) | 4.3 (5,585) | Free | Reference | ## More apps by Mapnitude Company Limited - [Elevation - Altimeter Map](https://appshunter.io/ios/app/elevation-altimeter-map/id480740433) - [#Nowplaying - Tweet Your Music](https://appshunter.io/ios/app/nowplaying-tweet-your-music/id482604258) - [Distance - Find My Distance](https://appshunter.io/ios/app/distance-find-my-distance/id483591610) - [Area & Distance - Map Measure](https://appshunter.io/ios/app/area-and-distance-map-measure/id486082774) - [Luminos Map: Twilight Nav Tool](https://appshunter.io/ios/app/luminos-map-twilight-nav-tool/id490077695) - [Coordinates – GPS Converter](https://appshunter.io/ios/app/coordinates-gps-converter/id494286614) All apps by Mapnitude Company Limited: https://appshunter.io/developer/473558784 --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-10.*