Comparison

DC Wire Sizer vs Epoch Pro

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

Head to head
About

DC Wire Sizer

Calculate appropriate DC wire sizes for electrical projects, preventing equipment damage and fires. Save, edit, and export wire run details for electrical plans and material purchases. Features a wizard for easy sizing for all users.

Highlights
  • Calculates wire size, voltage drop, and ampacity
  • Supports custom DC voltages up to 500 amps
  • Save, edit, and export wire run details
  • Sizer Wizard for easy calculations
  • Select marine standards (ABYC or ISO)
  • Choose from various wire types and insulation ratings
Features
Read full description

Adding accessories (bilge pumps, electronics, solar, etc.) or upgrading batteries (AGM, Li, etc.) this year?  The #1 Cause of Boat and RV fires is DC wiring!  Undersized wires can damage equipment or cause fires.  The top-rated DC Wire Sizer calculates wire size for any DC voltage (ideal for solar in series). Plus lets you SAVE, EDIT, SUM, EMAIL and EXPORT the wire runs and material for your electrical plan, wire purchases, work orders, and records. And the Sizer Wizard option makes wire sizing easy for EVERYONE! Fast and safe wire sizing calculator for your next DC wiring project (battery, charger, inverter, trolling motor, stereo, and more). Designed with and for Marine Electronics Installers, Repair Services, Boat Builders, Surveyors, Do-It-Yourselfers, and Boat Owners. ONLY DC WIRE SIZER OFFERS these FEATURES: - Select any DC voltage and up to 500 amps - Results display wire size, VOLTAGE DROP (VD), and AMPACITY! - More granular “What if” analysis of ampacity & VD based on wire sizes & length - Choose from three methods of entering wire lengths for fast entry including separate positive/negative wire lengths (when different or negative is contact grounded, like a starter) - SAVE Wire Runs with the option to select or enter Wire Run & Project Name, wire type, wire color, status, and material source (Inventory or Buy) - EDIT Wire Runs including wire length, amps/watts, max voltage drop, insulations, inside/outside engine room, bundle, and the fields above. - SUMs active wire run lengths by size, type, and color to make purchasing easier and less expensive when by the reel (25’, 50’, 100’, etc.) - Select from a wire type list (e.g., primary, battery, safety, flat, duplex, triplex, mast, twisted, bilge, trailer, and solar cable) - Select marine standards (ABYC or ISO) - Change Unit of Measurement (Feet or Meters) in existing Wire Runs - Easy to use Sizer Wizard - Email and Export of Wire Runs and Raw Material MORE FEATURES: - Set default Wire Gauge (AWG, SAE, or MM2) - Set default Unit of Measure (feet or meters) - Select or enter Maximum Voltage Drop % - Select Bundle Size (1, 2-3, 4-6, 7-24, and 25+) - Select Insulation rating (60°, 75°, 80°, 90°, 105°, 125°, and 200°C) - Tap Inside/Outside Engine Room - Spin Amp/Watts and Wire Length for fast entry - Built-in Help and Technical Reference includes installation tips, connector types, color codes, tables (Voltage Drop, Ampacity, & Bundle), formulas (Power Triangle, Ohm's Law, etc.), recommended tools/books, and more. HERE’S WHAT REVIEWERS ARE SAYING: "The DC Wire Sizer is the most complete and comprehensive marine DC wire-sizing tool available. Developed for both marine professionals (the Wire Sizer Pro) and the occasional tinkerer (the Wire Sizer Wizard), the app determines the proper wire size, along with the voltage drop and ampacity by using the ABYC E-11 or ISO 10133 formulas and tables.” -  OnboardOnline (2013) "Stay organized by adding a wire description to the wire run and assign it to a project name (ie boat name, owner or work order). Mark the wire run as "Complete" or “Cancelled”, re-order wire runs within a project or move them between projects. Tired of adding wire runs in order to figure out what to purchase and how much? DC Wire Sizer sums the active wire runs for you by wire size (e.g. 8 AWG) and type (e.g. Safety Duplex, Battery Cable, and Primary Wire).” - marinabusiness (AU 2013) "If you're doing a lot of wiring on your boat, the app allows you to save the calculations with project names and wire type.  The app then can sum the length of the wire runs by wire type and size which can be used as a shopping list for your projects.  No other app offers these unique features and that's what makes it a winner.”  - i-marineapps (2013) "This is the best wire sizer program I have seen to date.  I can size and make a list at the same time also there is a better selection of amps and volts.” - Keith Herridge, Special Projects, Lyman-Morse Boatbuilding

About

Epoch Pro

Monitor and manage your Epoch Pro batteries with this app. It provides real-time data on individual batteries and systems, offers Bluetooth connectivity for enhanced user experience, and helps extend battery life and stability.

Highlights
  • Real-time SOC, voltage, current, capacity, temperature monitoring
  • Individual battery voltage and alarm status display
  • Cell temperature and parameter warnings (over/under voltage, over current)
  • Bluetooth connectivity for battery systems
  • Record of warnings and protection events
  • Extend battery service life and enhance stability
Features
Read full description

The Epoch Pro APP is specifically designed for Epoch Pro batteries and supports information monitoring of individual batteries, as well as battery systems in air connection or wired connection, etc. You can also easily realize the Bluetooth function of the GC2 batteris by connecting the Bluetooth module for more comfortable and convenient user experience. Make sure you have the latest app version. Turn on your Bluetooth. Tap the icon to open the App. It will search for all Epoch Pro batteries within the range of your Bluetooth device and provide a list. If all the batteries are not listed, move closer to the battery location and refresh the screen. Choose the battery you want to look at. The Epoch intelligent battery management system and the active equalizer are connected via Bluetooth to monitor the battery status, collect, store and process information during battery operation in real time, exchange information with external devices, and solve the safety, usability and usage of the lithium battery system. The key issue of life is to extend the service life of the battery to a certain extent, and to enhance the stability of the battery pack to a certain extent. 1. Display real-time SOC, voltage, current, capacity, temperature, and other parameter values, and display them in the form of instrument panels and numbers; 2. Display the real-time voltage and alarm status of all single batteries. If the reported parameters trigger the alarm value or protection value, an alarm will be prompted; 3. Cell temperature warning. Real-time alarm for over temperature, over current, over voltage, under voltage. 4. Record the warnings/protection that occur at each moment. Best Regards!

Screenshots

DC Wire Sizer4 screens
Epoch Pro3 screens

Verdict

The call

The clearest difference is price: Epoch Pro at Free against DC Wire Sizer's $2.99. DC Wire Sizer's advantage is rating (5.0 vs 4.0) and review sentiment (100% vs 59%). On ratings volume, update cadence, ads and in-app purchases 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

CostPrice · In-app purchases · Ads · Monetization

Epoch Pro is free to download; DC Wire Sizer costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

DC Wire Sizer holds the better App Store score, 5.0 against 4.0. Both are backed by a comparable volume of ratings — 24 and 25 respectively. Written reviews point the same way: 100% of DC Wire Sizer's written reviews are positive against 59% of Epoch Pro's.

UpkeepUpdate frequency

DC Wire Sizer ships an update every 20 months, Epoch Pro every 13 months. The most recent releases landed on October 3, 2026 and October 9, 2026 respectively.

Scorecard5 real differences · 5 level
DC Wire Sizer versus Epoch Pro: the parameters behind the verdict, then further details
ParameterDC Wire SizerEpoch Pro
Price$2.99Free — better
Rating5.0 (24 ratings) — better4.0 (25 ratings)
Positive reviews100.0% of reviews — better58.8% of reviews
Number of ratings2425 — better
Update frequencyEvery 20 monthsEvery 13 months — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidFree — better
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS9.0 — better13.0
Further details — not scored
Size21 MB17 MB
Age rating4+4+
DeveloperDirty Dog Software, LLCEDG Sales International LLC

Customer experience

DC Wire Sizer

All ratings24 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews14 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Epoch Pro

All ratings25 ratings
Positive72.0%
Neutral4.0%
Negative24.0%
Written reviews17 reviews
Positive58.8%
Neutral11.8%
Negative29.4%

In-app purchases

None

DC Wire Sizer

No in-app purchases

None

Epoch Pro

No in-app purchases

Questions

Is DC Wire Sizer free?
DC Wire Sizer costs $2.99, with no in-app purchases.
Is Epoch Pro free?
Epoch Pro is free to download, with no in-app purchases.
Which has better reviews, DC Wire Sizer or Epoch Pro?
DC Wire Sizer is rated higher. DC Wire Sizer averages 5.0 out of 5 from 24 ratings, while Epoch Pro averages 4.0 from 25 ratings.
Do DC Wire Sizer or Epoch Pro have ads?
Neither DC Wire Sizer nor Epoch Pro shows ads.
Which is updated more often, DC Wire Sizer or Epoch Pro?
DC Wire Sizer ships an update every 20 months, and Epoch Pro every 13 months. Most recently, DC Wire Sizer was updated on October 3, 2026 and Epoch Pro on October 9, 2026.

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