WireSizer vs Epoch Pro
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
WireSizer
This app quickly calculates the correct DC wire gauge needed for any circuit. Simply input voltage, current, and length to determine the optimal wire size, considering voltage drop and ampacity limits. It's suitable for various DC systems up to 60 VDC.
- Instant DC wire size calculation
- Voltage drop percentage selection
- Ampacity limit checks
- Supports various wire types and gauges
- Adjustable for installation conditions
- Materials list for selections
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WireSizer is the fast, accurate, and easy-to-use DC wire size calculator for choosing the correct wire gauge every time. Simply select your DC voltage, current, and total circuit length with flips of your finger. No keyboard required. WireSizer instantly calculates the correct wire gauge for the Voltage Drop percentage you need. WireSizer is ideal for: • Boats and marine electrical systems • RVs, trucks, and cars • Radios and electronics • Solar power and battery-based DC systems • Any low-voltage DC system up to 60 VDC Suitable for both professionals and DIY users. WireSizer automatically calculates the minimum wire size required for your circuit (assuming copper wire), taking Voltage Drop into account for installation and temperature conditions. Results are checked against current-carrying capacity (ampacity) limits to prevent using unsafe undersized wire. Supported values: • Voltage up to 60 VDC • Current up to 500 amps • Total circuit length up to 600 feet or 200 meters • Voltage Drop 1 to 20 percent • AWG wire 18 gauge to 4/0, plus 250 & 300 kcmil • SAE wire 18 gauge to 4/0 • Metric wire 0.75 mm² to 150 mm² WireSizer allows you to fine-tune calculations based on real-world installation conditions: • Engine compartment or other high-temperature environments • Sheathed, bundled, or conduit-run wire • Wire insulation ratings from 60°C to 200°C WireSizer also includes a Materials List so you can record and review all of your wire selections in one place. WireSizer calculates DC wire sizes in accordance with ABYC E-11 (July 2025). For typical low-voltage DC circuits, results generally correspond with ISO 13297:2020. Results are a design aid; final wire selection and installation compliance remain the installer's responsibility. Number and decimal formatting will follow your device's regional and language settings. WireSizer works without an internet connection and contains no ads. Designed exclusively for DC circuits - not for use with AC circuits. Results are a design aid. Final wire selection and installation compliance remain the installer's responsibility. WireSizer will cost you less than the wire scraps you probably throw away at the end of the day.
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.
- 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
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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
Verdict
The clearest difference is price: Epoch Pro at Free against WireSizer's $4.99. Epoch Pro also leads on iOS requirement (13.0 vs 26.0). WireSizer's advantage is rating (4.5 vs 3.9) and review sentiment (84% vs 59%). On ads, in-app purchases and device support 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
Epoch Pro is free to download; WireSizer costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.
WireSizer holds the better App Store score, 4.5 against 3.9. That said, the two scores are not equally well evidenced: WireSizer has 227 ratings behind it against 26, so its average is the more settled of the two. Written reviews point the same way: 84% of WireSizer's written reviews are positive against 59% of Epoch Pro's.
WireSizer ships an update every 5 months, Epoch Pro every 13 months. Both last shipped on October 21, 2026.
| Parameter | WireSizer | Epoch Pro |
|---|---|---|
| Price | $4.99 | Free — better |
| Rating | 4.5 (227 ratings) — better | 3.9 (26 ratings) |
| Positive reviews | 83.8% of reviews — better | 58.8% of reviews |
| Number of ratings | 227 — better | 26 |
| Update frequency | Every 5 months — better | Every 13 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Free — better |
| Devices | iPhone, iPad | iPhone, iPod |
| Requires iOS | 26.0 | 13.0 — better |
| Further details — not scored | ||
| Size | 2 MB | 17 MB |
| Age rating | 4+ | 4+ |
| Developer | Juggernaut Technology, Inc. | EDG Sales International LLC |
Customer experience
WireSizer
Epoch Pro
Bugs and requests
WireSizer
Requested features
6 requests- AC calculation for higher voltages
- Support for higher DC voltages (e.g., 150VDC)
- Support for AC voltages (e.g., 240VAC)
- Include actual voltage drop on final screen
- More variables like wire ampacity and cables in a bundle
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- Support for longer lengths
Epoch Pro
Not enough reviews yet to summarise bugs or requests.
In-app purchases
WireSizer
No in-app purchases
Epoch Pro
No in-app purchases








