Comparison

Mac Tools vs Voltage Drop Pro

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

Head to head
About

Mac Tools

This app transforms your iOS device into a sound and vibration detection tool. It helps pinpoint defective parts in vehicles and machinery by analyzing rattles, squeaks, and grinding sounds. Requires additional hardware for full functionality.

Highlights
  • Sound and vibration detection
  • Pinpoints defective parts
  • User-friendly interface
  • Analog and digital display options
  • Adjustable sound settings
  • Informative user guide
Features
Read full description

Developed for the service technician in mind, the Mac Tools SmartEAR LITE Sound & Vibration Detection app will assist in locating and pinpointing defective or worn parts in automobiles, heavy machinery or industrial equipment. When used to diagnose vibration, rattles, squeaks and grinding sounds, the SmartEAR LITE will simplify the task of locating and pinpointing the troubled area or part with ease. When used with our specially designed hardware kits your iOS device will be able to transform into a state of the art Sound & Vibration Detection Tool allowing for ease of locating and pinpointing those hard to find troubled areas or parts. ****NOTE: Additional hardware is required to use this app. For information on how to purchase hardware please contact your local Mac Tools Distributor or call 1-800-MAC-TOOLS**** Features: User friendly interface and intuitive operation. Sound level reading displays average, peak and real-time values. Sound level readings are displayed in either Analog or Digital. Analog and Digital readings have 2 display panels the user can choose from. Analog Meter or Analog Wave-Form. Digital Numeric or Digital Bar Graph. Background sound off-setting, sample rates, decibel off-setting can be manually be set. Reset/Refresh buttons reset/refresh values to default settings. Sound Level Reading Sampling Rate Decibel Off-set Master Volume Control User information guide includes informative facts about sound perception and permissible noise level exposure as well as a sound level comparison reference chart. Additional Information: Required: Any iOS device running iOS 5.0+. Recommended: iPhone 4 and newer/ iPod Touch 4 and newer. Compatible: iPad 2 and newer.

About

Voltage Drop Pro

Features
Read full description

Voltage Drop Pro calculates voltage drop per NEC 2023 Article 210.19 and 215.2 — the code sections that determine if your conductor run keeps voltage drop within acceptable limits. Works offline. No subscription. One-time purchase. WHAT IT CALCULATES - Branch circuits (210.19) and feeders (215.2) - Copper (K=10.4) and aluminum (K=17.0) conductors at 75°C - All wire sizes — 14 AWG through 500 kcmil - System voltages from 120V to 480V VERDICTS BACKED BY CODE Compares your voltage drop percentage against the NEC-recommended 3% branch/feeder max and 5% combined max. Get an instant PASS or FAIL — with the actual voltage drop, margin, and wire data shown. BUILT FOR THE FIELD No ads. No cloud. No account required. Designed for electricians who need the answer in seconds, not after a signup flow. PART OF THE FIELDMETRIC SUITE Also available: Box Fill Pro (NEC box fill) and Conduit Fill Pro (NEC conduit fill calculations).

Screenshots

Mac Tools4 screens
Voltage Drop Pro4 screens

Verdict

The call

The clearest difference is in-app purchases: Mac Tools at none against Voltage Drop Pro's 1. Voltage Drop Pro's advantage is update cadence (every 3 months vs every 28 months). On price, ads, device support and iOS requirement 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

Both are free to download. Voltage Drop Pro sells 1 one-off in-app purchase. Mac Tools asks for nothing beyond the download.

UpkeepUpdate frequency

Mac Tools ships an update every 28 months, Voltage Drop Pro every 3 months. The most recent releases landed on October 16, 2026 and October 28, 2026 respectively.

Scorecard2 real differences · 8 level
Mac Tools versus Voltage Drop Pro: the parameters behind the verdict, then further details
ParameterMac ToolsVoltage Drop Pro
PriceFreeFree
Rating5.0 (1 ratings) — better—
Positive reviews50.0% of reviews—
Number of ratings1 — better—
Update frequencyEvery 28 monthsEvery 3 months — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree—
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS15.0 — better15.1
Further details — not scored
Size12 MB39 MB
Age rating4+4+
DeveloperJS Products, Inc.BRUCE RAY MCCAMPBELL

In-app purchases

None

Mac Tools

No in-app purchases

1 purchases

Voltage Drop Pro

One-time1
  • Voltage Drop Pro$2.99

Questions

Is Mac Tools free?
Mac Tools is free to download, with no in-app purchases.
Is Voltage Drop Pro free?
Voltage Drop Pro is free to download, with in-app purchases available.
Do Mac Tools or Voltage Drop Pro have ads?
Neither Mac Tools nor Voltage Drop Pro shows ads.
Which is updated more often, Mac Tools or Voltage Drop Pro?
Mac Tools ships an update every 28 months, and Voltage Drop Pro every 3 months. Most recently, Mac Tools was updated on October 16, 2026 and Voltage Drop Pro on October 28, 2026.

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