ServiceCalc vs Edge EZ
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
ServiceCalc
This tool automates invoice calculations for service technicians, reducing errors and time spent. It handles labor, parts, tax, and totals, with features like a built-in timer and flashlight.
- Automated labor calculation
- Parts/materials totaling
- Configurable tax rates
- Built-in timer
- Flashlight function
- Customizable skins
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***FEATURED IN KEYNOTES MAGAZINE*** ServiceCalc cuts time spent and reduces errors when totaling invoices out in the field. This tool automates and displays the Labor, Parts/Materials, Tax, and Total. ServiceCalc is ideal for Locksmiths, Electricians, Plumbers, or any other service technicians that frequently write up invoices. Conventional Method: -Sub total line items on invoice -Add up labor on a standard calculator -Write down labor on invoice -Clear the calculator's screen -Add up parts/materials -Write down on invoice -Multiply tax rate -Write down on invoice -Clear calculator's screen -Add labor, parts, and tax -Write total on invoice ServiceCalc Method: -Sub total line items on invoice -Add up labor and tap Labor button -Add up parts and tap Parts button*** -Write down totals on invoice ***Parts are added per line. The timer is used to create a delay when making a single multiplication. This delay gives you enough time to read its subtotal to then transfer onto the invoice.*** After tapping Parts you can turn your iDevice sideways (landscape) for a larger readout. Quickly add the desired labor by tapping the half hour or full hour buttons. Two tax rates are configurable to allow multiple jurisdictions. The secondary tax rate can also be used as a tip calculator. Built in flashlight function for illuminating your invoice. 3 Skins to choose from: Original, Blue Steel, and Magnum ---------------------------------- Totals truncate to 2 decimal places. Tax is rounded up to the hundredths when the halfway point is a value of 5 or higher. Example: if tax = 2.775, actual tax = 2.78 if tax = 2.77445, actual tax = 2.78 if tax = 2.771, actual tax = 2.77 ---------------------------------- Compatibility: iPhone / iPod touch on iOS 8.0 or later and iPad on iOS 12.0 or later. Found a bug? Something not working? Have a suggestion? Feel free to contact me via email: farren@phoxlocks.com
Edge EZ
This application allows users to control their inline module directly from their smartphone. Adjust power levels and throttle boost settings to customize your driving experience. Upgrade your vehicle and unlock its full engine potential.
- Control inline module
- Adjust power levels
- Modify throttle boost
- Customize driving experience
- Unlock engine potential
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Use the Edge EZ app to control your inline module on the fly! Using the smartphone app in conjunction with the Edge EZ plug and play module, change between five power levels and throttle boost settings giving you control over your driving experience. Upgrade your truck with Edge EZ and unleash the full potential of your engine. Product features may vary by vehicle application, please visit the product page on our website for full product details.
Screenshots
Verdict
The clearest difference is review sentiment: ServiceCalc at 91% against Edge EZ's 0%. ServiceCalc also leads on update cadence (every 2 months vs every 4 months) and iOS requirement (12.0 vs 15.0). Edge EZ's advantage is price (Free vs $0.99) and rating (4.8 vs 4.0). On ratings volume, 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
Edge EZ is free to download; ServiceCalc costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Edge EZ holds the better App Store score, 4.8 against 4.0. Both are backed by a comparable volume of ratings — 4 and 4 respectively. Written reviews complicate that: 91% of ServiceCalc's written reviews are positive against 0% of Edge EZ's, so the app with the better star average is not the one people write more warmly about.
ServiceCalc ships an update every 2 months, Edge EZ every 4 months. The most recent releases landed on October 10, 2026 and October 5, 2026 respectively.
| Parameter | ServiceCalc | Edge EZ |
|---|---|---|
| Price | $0.99 | Free — better |
| Rating | 4.0 (4 ratings) | 4.8 (4 ratings) — better |
| Positive reviews | 90.9% of reviews — better | 0.0% of reviews |
| Number of ratings | 4 | 4 |
| Update frequency | Every 2 months — better | Every 4 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Free — better |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 12.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 1 MB | 128 MB |
| Age rating | 4+ | 4+ |
| Developer | Farren Domenici | Holley Performance Products |
Customer experience
ServiceCalc
Edge EZ
In-app purchases
ServiceCalc
No in-app purchases
Edge EZ
No in-app purchases









