ServiceCalc vs Edge EZX
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 EZX
Enhance your late model diesel truck's performance with this app, offering improved drivability, mileage, and power. Control features like tire size calibration and DPF regens via a smartphone interface. Built-in safety features protect your engine.
- Improved drivability, mileage, and power
- Interactive smartphone app control
- 5 adjustable power levels
- Tire size calibration
- Manual DPF regens
- TPMS adjustment
- Built-in turbo timer
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The EZX from Edge Products offers late model diesel truck owners better drivability, improved mileage and more power through an all-new module with an interactive smartphone app like nothing else on the market. Developed specifically for late model Ram 6.7L Cummins, Ford 6.7L Power Stroke diesel and Chevy 3.0L Duramax, the EZX builds upon our popular Edge EZ box that has led the market for more than a decade with mild power gains and modest mileage improvements. Using the industry's most advanced technology, our new smartphone interface offers unmatched adjustability over your trucks features. The simple plug n’ play under hood module integrates seamlessly with your truck for complete control over your driving experience with 5 power levels adjustable on the fly. Using factory steering wheel controls, the factory gauge cluster and our integrated app, the EZX adds the extra power and throttle response your diesel needs. Our emissions safe tuning offers broad usable power gains you’ll feel while towing and daily driving. This smartphone app offers simple control over features like tire size calibration, manual DPF regens, TPMS adjustment, and even a built-in turbo timer (options vary by vehicle make and model). Built-in safety features like Engine Coolant Temperature protection offers the peace of mind knowing your engine always performs to the best of its ability without potential of harm from the added power. Pick up the all-new EZX module anywhere Edge Products devices are sold and download the app now!
Screenshots
Verdict
The clearest difference is review sentiment: ServiceCalc at 91% against Edge EZX's 0%. ServiceCalc also leads on rating (4.0 vs 2.8) and iOS requirement (12.0 vs 15.0). Edge EZX's advantage is price (Free vs $0.99). 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
Edge EZX is free to download; ServiceCalc costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.
ServiceCalc holds the better App Store score, 4.0 against 2.8. Both are backed by a comparable volume of ratings — 4 and 11 respectively. Written reviews point the same way: 91% of ServiceCalc's written reviews are positive against 0% of Edge EZX's.
Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on October 10, 2026 and October 12, 2026 respectively.
| Parameter | ServiceCalc | Edge EZX |
|---|---|---|
| Price | $0.99 | Free — better |
| Rating | 4.0 (4 ratings) — better | 2.8 (11 ratings) |
| Positive reviews | 90.9% of reviews — better | 0.0% of reviews |
| Number of ratings | 4 | 11 — better |
| Update frequency | Every 2 months | Every 2 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 | 130 MB |
| Age rating | 4+ | 4+ |
| Developer | Farren Domenici | Holley Performance Products |
Customer experience
ServiceCalc
Edge EZX
In-app purchases
ServiceCalc
No in-app purchases
Edge EZX
No in-app purchases









