FrackCalc vs EOS
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
FrackCalc
This app provides on-the-go hydraulic fracturing calculations for the oilfield. It helps determine chemical rates, fluid clean-up, proppant amounts, and pump speeds. Includes a unit converter for common oilfield measurements.
- Hydraulic fracturing calculations
- Proppant amount and height determination
- RPM calculator for pumping speeds
- Hydrostatic calculator for proppant-laden slurry
- Oilfield unit converter
- Pump rate calculation based on transmission curves
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FracCalc is an all-in-one oilfield calculator engineered by Moosaa Young specifically for hydraulic fracturing operations. Perform essential oilfield calculations and track your stage bonuses on the fly directly from your phone — no internet connection or manual equation lookups required! Key Features & Calculators: • Stage Bonus & Salary Calculator: Log daily pumped stages, customize stage rate schedule templates (1 to 40 stages), calculate total bonus and salary earnings with multi-currency support, share/import schedules via AirDrop or file picker, and track multi-year earnings history. • Brine & Acid-Brine Calculator: Calculate Specific Gravity (SG), solution density (ppg), final bbl volume, and dry salt requirements (lbs/bbl) for KCl, CaCl2, CaBr2, and NaCl brines with built-in solubility limits and interactive reference tables. • Frac Pump Simulator: Simulate Caterpillar and Allison transmission curve outputs to view exact pump rates in high-visibility BPM with live lockup status and pressure safety limits. • Chemical & Fluid Rates: Rapidly determine chemical injection rates and fluid clean rates during operations. • Screenout & Proppant Height: Calculate exact proppant volume and settled height post-screenout, giving Coiled Tubing teams precise estimates of where tool tag is expected. • Auger RPM Calculator: User-friendly sliders and steppers help you dial in exact auger speeds while pumping, eliminating target undershoot or overshoot. • Hydrostatic & Slurry Pressure: Calculate proppant-laden slurry hydrostatic pressure in the wellbore to forecast surface pressure drops as proppant concentration increases. • Oilfield Unit Converter: Quick conversion utility for all standard oilfield engineering units. • Modern Dark-Mode & Edge Swipe Navigation: Enjoy a sleek, dark-mode friendly card interface with fluid edge-swipe navigation designed for fast field use. Designed by field engineers for field engineers — put fast, reliable frac calculations, instant AirDrop template sharing, and stage bonus tracking right in your pocket!
EOS
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EOS Mobile enables equipment health, field operations, engineering, logistics, and many more aspects of NexTier's completions business. Check out the Demo Mode to see how EOS Mobile will contribute to equipment health and operation success on your NexTier well site!
Screenshots
Verdict
The clearest difference is price: EOS at Free against FrackCalc's $9.99. FrackCalc's advantage is update cadence (weekly vs every 3 weeks). On ads, in-app purchases, 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
EOS is free to download; FrackCalc costs $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.
FrackCalc ships an update weekly, EOS every 3 weeks. The most recent releases landed on September 7, 2026 and September 16, 2026 respectively.
| Parameter | FrackCalc | EOS |
|---|---|---|
| Price | $9.99 | Free — better |
| Rating | 5.0 (1 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 1 — better | — |
| Update frequency | Weekly — better | Every 3 weeks |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | — |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 16.0 | 15.6 — better |
| Further details — not scored | ||
| Size | 13 MB | 52 MB |
| Age rating | 4+ | 4+ |
| Developer | Moosaa Young | NexTier Oilfield Solutions, Inc. |
In-app purchases
FrackCalc
No in-app purchases
EOS
No in-app purchases








