# WireSizer - DC Voltage Drop — user reviews > 37 indexed App Store user reviews of WireSizer by Juggernaut Technology, Inc., rated 4.50/5 from 225 ratings. - Source: https://appshunter.io/ios/app/wiresizer-dc-voltage-drop/id494748550/reviews - App overview in markdown: https://appshunter.io/ios/app/wiresizer-dc-voltage-drop/id494748550.md - Rating breakdown: 5★ 181 · 4★ 16 · 3★ 3 · 2★ 6 · 1★ 19 ## Newest reviews (11 of 37) ### 5/5 — Great app! *2018-09-06* This app is great for a non-electrician to use! ### 5/5 — Way cool and useful for projects! *2018-06-23* Working on solar for my trailer. I’m confident I’ve got the right wire sizes. ### 5/5 — Great easy to use wire gauge calculator *2017-03-04* I use this app in my marine electrical business and find it a valuable tool. No having to lookup or calculate wire thickness while running wire. ### 5/5 — Very Useful *2015-06-29* Easy intuitive app that has been very helpful in my work ### 5/5 — Simple. Easy *2015-03-09* Great simple app for quick calcs. ### 5/5 — Great app for simple DC work *2015-02-22, version 3.11* Great for simple DC wire engineering ### 5/5 — Excellente application *2014-02-27* J'enseigne l'électricité à des plaisanciers depuis plus de 20 ans. Wire Sizer est une application de calcul que je recommande chaudement à mes élèves, de par son aspect pratique, utilitaire et son efficacité. De plus elle répond aux normes ABYC ce qui en fait un produit hautement recommandable. ### 5/5 — Great ap for the boat *2013-10-03* Rewiring my boat. 12v. And works like a charm ### 5/5 — Works like a charm *2013-09-17* Works very well and the interface is very easy to use ### 5/5 — Handy *2013-08-20* I use it often for remote well sites that use DC. It's handy and easy to use. Lengths aren't long enough sometimes. ### 4/5 — Owner *2013-07-02* Great handy app. Quick and simple. ## Most critical reviews (10 lowest-rated) ### 1/5 — Super bad investment *2023-11-12* There is no real calculation… all has no utility, totally useless. **Developer response:** WireSizer calculates the minimum wire size needed to meet voltage drop requirements based on user inputs (voltage, circuit length, operating environment, wire insulation rating, and current/watts). In addition, it also verifies the "Ampacity" of the wire to make sure it is safe for your circuit. Details on calculations made and formulas used can be found in the WireSizer "User Guide" within the app or online from WireSizer.com. Users can always request a refund from Apple if an app does not meet their expectations. ### 1/5 — Only does DC current. *2022-04-15* Lame **Developer response:** Yes, it is DC only. As clearly indicated by its subtitle in the App Store "DC Voltage Drop Calculator", and as clearly stated in its App Store product description multiple times, including in ALL CAPS - "NOT FOR USE WITH AC CIRCUITS!". ### 1/5 — Solar electrician *2018-12-20* This is a waste of my money ### 1/5 — Only does up to 50V DC *2015-10-29, version 3.11* No high voltage and no AC. ### 2/5 — Limited *2015-12-09* Need AC and higher voltages. Easy to use but needs more configurations ### 3/5 — Handy for DC only *2013-04-04, version 2.21* Simple, easy. I would rate the app 5 stars if it did AC calculations. ### 4/5 — Very helpful, limited to 50VDC *2021-05-28* I use this app all the time! Would use it even more if it could support higher voltages. I’d like to see at least 150vdc, and 240vac. Thanks for the useful tool! **Developer response:** The latest version now allows voltage up to 60 volts DC.  Calculating wire sizes for higher voltages requires taking into account some additional factors to do properly (which many voltage drop calculators neglect). We are planning on investigating the feasibility of this in the future. Thanks for the review! ### 4/5 — Almost perfect *2016-01-31* Useful app but it would help enormously if the final screen with the actual volt drop included voltage as well as percentage. Most of our equipment specifies max and min voltage so we need to perform another step to convert your percentage figure into a voltage. ### 4/5 — Really dude, you gave a poor rating to a good app because you didn’t read the screen or description *2014-03-25* Both the screens and the description reviews indicate the App is for DC (before the More). It’s not fair to give a poor review because you didn’t take the time to read the description. This was one of the first marine DC wire sizing apps in the AppStore and he’s continued to improve on the app over the years. It’s a good app by a caring developer and an experienced boater. ### 4/5 — Dan Caracas *2013-09-02* Same as my colleague : AC = also necessary ## Most praised reviews (10 highest-rated) ### 5/5 — Simple, ABYC-based and by far the best *2026-05-09* It’s so nice having a professional app that does its job and does not get bogged down with bells and whistles: The app only has one page! I have used WireSizer daily for years because it’s quick and gives the critical voltage drop information needed to choose correct wire size, while being entirely interactive: Spin gauge, amperage or length wheels and the results are instantly updated, making decisions easy and quick. ### 5/5 — Easy to use, works great. *2024-05-15* This app is one of my essential tools while doing any electrical project, it’s great. ### 5/5 — FAST calculator + handy material list. *2023-06-03* This is an absolute must have! As a home DIYer I wish I had this years ago instead of referring to a chart as a guide. In the process of Installing a vehicle 12v and solar system and this has become extremely handy and sped up the building process significantly. The ‘+’ for material list is the cherry on top. Highly recommend A+++ ### 5/5 — Terrific app! Simple, as it ought to be *2022-06-09, version 3.22* I use it daily in my boat electrical work. I would like an AC calculation for higher voltages, in future versions of the app. ### 5/5 — Terrific app! Simple, as it ought to be *2022-06-09, version 3.22* I use it daily in my boat electrical work. I would like an AC calculation for higher voltages, in future versions of the app. ### 5/5 — Easy to use and accurate *2022-02-20* I am a Marine Engineer and I use this app at my desk and in the field to run “how to” calculations to determine the wire size required for a particular voltage, load current and circuit run. The spinner wheels make it very easy to enter the data and the drill down that is available when the results tapped is an excellent bonus. My favorite wire sizing app. ### 5/5 — Wire sizer app *2020-04-25* This is a fantastic app that is really accurate. The app has made my life so much easier when re-wiring my boat. 👍 ### 5/5 — Great app. *2020-04-07* Very useful. ### 5/5 — Works well, some limitations *2019-08-16* Overall it’s a very good tool. I use it to size DC wires runs for solar. I have verified accuracy with manual calculations of voltage drop. It’s limited to 50vdc maximum so works well for up to 48vdc battery banks but can’t use it for solar panels in series as voltage exceed 50v limit. **Developer response:** The latest version of WireSizer now supports up to 60 VDC. Suitable for charging systems (and solar) for 48vdc battery systems. Thanks for the review! ### 5/5 — Wire Sizer *2019-07-13* Awesome --- *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 2026-08-28.*