Comparison

DC Wire Sizer vs Anchor 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

Anchor Pro

This app helps boaters set and monitor their anchor position in real-time. It allows for defining safe zones, tracking boat movement, and receiving alerts for critical changes. Remote notifications and Apple Watch integration enhance its utility for secure anchoring.

Highlights
  • Set anchor location in real-time or manually
  • Define custom safe swing zones
  • Monitor boat movement and track history
  • Receive real-time alerts for position, GPS, and battery
  • Remote notifications via Telegram or email
  • Apple Watch companion app for key metrics
Features
Read full description

SET THE ANCHOR Set your anchor location in real time as you drop it, or specify it later by entering distance and bearing. Advanced users can also input exact coordinates. DEFINE THE SAFE ZONE Define the allowed swing area as a simple circle around the anchor, or create a more precise zone by setting two different radii at specific angles. MONITOR MOVEMENT Stay on top of every movement with comprehensive real-time data. Review key metrics on the main screen or switch to the map view to see your boat's track — ideal for analyzing whether your anchor is holding or dragging. GET ALERTED WHEN IT MATTERS Monitor position, GPS signal strength, and battery level — and receive alerts the moment any of these fall outside your set thresholds. REMOTE ALERTS Leave your phone on board and stay informed from shore. Receive alarm notifications via Telegram or email. With Telegram, you can also request a live status update at any time. APPLE WATCH Keep distance, bearing, and battery level on your wrist with the Apple Watch companion app — all updated in real time. TRY ANCHOR PRO FOR FREE Core features are always free. Want to explore everything? All premium features are available during a free trial period — no commitment required. Anchor Pro is ad-supported. Purchasing an Anchor Premium subscription removes ads and unlocks extra features. Payment is charged to your iTunes Account at confirmation. Subscriptions renew automatically at the same price unless auto-renewal is turned off at least 24 hours before the current period ends. You can manage auto-renewal anytime in your Account Settings. Anchor Premium is $6.99 USD/year (pricing may vary by country). Any unused portion of a free trial is forfeited upon purchasing a subscription, where applicable. Terms of use: https://links.ideaboys.net/anchor-ios-terms.html GOOD TO KNOW Anchor Pro uses background audio and location services to keep alerts active when the app is not in the foreground. Please note that continuous GPS use will drain your battery faster than usual.

Screenshots

DC Wire Sizer4 screens
Anchor Pro4 screens

Verdict

The call

The clearest difference is price: Anchor Pro at Free against DC Wire Sizer's $2.99. Anchor Pro also leads on update cadence (every 2 months vs every 20 months) and ratings volume (3.5K vs 24). DC Wire Sizer's advantage is in-app purchases (none vs 1) and review sentiment (100% vs 79%). On ads 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

CostPrice · In-app purchases · Ads · Monetization

Anchor Pro is free to download; DC Wire Sizer costs $2.99 up front. Anchor Pro sells 1 in-app purchase, starting at $6.99 per year. DC Wire Sizer asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

DC Wire Sizer holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: Anchor Pro has 3.5K ratings behind it against 24, so its average is the more settled of the two. Written reviews point the same way: 100% of DC Wire Sizer's written reviews are positive against 79% of Anchor Pro's.

UpkeepUpdate frequency

DC Wire Sizer ships an update every 20 months, Anchor Pro every 2 months. The most recent releases landed on October 3, 2026 and October 12, 2026 respectively.

Scorecard8 real differences · 2 level
DC Wire Sizer versus Anchor Pro: the parameters behind the verdict, then further details
ParameterDC Wire SizerAnchor Pro
Price$2.99Free — better
Rating5.0 (24 ratings) — better4.8 (3.5K ratings)
Positive reviews100.0% of reviews — better78.9% of reviews
Number of ratings243.5K — better
Update frequencyEvery 20 monthsEvery 2 months — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationPaidFree with in-app purchases — better
DevicesiPhone, iPad, iPodiPhone, iPad, Apple Watch
Requires iOS9.0 — better17.2
Further details — not scored
Size21 MB23 MB
Age rating4+4+
DeveloperDirty Dog Software, LLCIdeaBoys GmbH

Customer experience

DC Wire Sizer

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

Anchor Pro

All ratings3,496 ratings
Positive96.5%
Neutral1.7%
Negative1.7%
Written reviews180 reviews
Positive78.9%
Neutral3.3%
Negative17.8%

Bugs and requests

DC Wire Sizer

Not enough reviews yet to summarise bugs or requests.

Anchor Pro

Reported bugs

2 issues
  • App randomly shuts off
  • Anchor position tracking glitches

Requested features

3 requests
  • Customizable anchor icon/color
  • Integration with marine GPS/chartplotter
  • Ability to adjust alarm parameters remotely

In-app purchases

None

DC Wire Sizer

No in-app purchases

1 purchases

Anchor Pro

Subscriptions1
  • Anchor Premium7 Days trial$6.991 Year

Questions

Is DC Wire Sizer free?
DC Wire Sizer costs $2.99, with no in-app purchases.
Is Anchor Pro free?
Anchor Pro is free to download, with in-app purchases available.
Which has better reviews, DC Wire Sizer or Anchor Pro?
DC Wire Sizer is rated higher. DC Wire Sizer averages 5.0 out of 5 from 24 ratings, while Anchor Pro averages 4.8 from 3.5K ratings.
Do DC Wire Sizer or Anchor Pro have ads?
Neither DC Wire Sizer nor Anchor Pro shows ads.
Which is updated more often, DC Wire Sizer or Anchor Pro?
DC Wire Sizer ships an update every 20 months, and Anchor Pro every 2 months. Most recently, DC Wire Sizer was updated on October 3, 2026 and Anchor Pro on October 12, 2026.

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