EMEPA vs Kyanite Pro
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
EMEPA
Manage your account details, view bills and balances, make payments, and schedule alerts. Access nearly all web portal features instantly from your mobile device, anytime, anywhere.
- Secure account access
- View bill and balance
- Make payments
- Find payment locations
- Schedule alerts and reminders
- Receive push notifications
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Our Mobile App is designed to give you fast, secure account access so you can easily manage your account details, view your bill and your account balance, make payments and find payment locations, schedule alerts and reminders, receive push notifications, and more. Nearly everything you can do from our web portal can now be handled instantly whether you’re at home, at work, or on the go.
Kyanite Pro
This app offers a suite of offline drilling calculators and reference tools for oil and gas professionals. It includes features for mud engineers, cementers, and directional drillers, with options to share data with crews. A free tier provides basic tools, while a subscription unlocks advanced calculators and job sheets.
- Offline drilling calculators
- Mud, cement, and directional drilling tools
- Field notes and reference charts
- Crew data sharing
- Kill sheet and cement job sheet
- Chemical inventory management
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A professional calculation and reference tool for the people who run the well: drilling and mud engineers, solids control hands, cementers, directional drillers and MWD hands. The calculators work completely offline. No ads and no tracking, and no account is needed to use them. You only sign in if you want to share records with your crew. FREE TO START The scientific calculator, field notes, reference charts, volume tables and the hitch calendar are free, along with the full calculator catalog so you can see what you are paying for. KYANITE PRO Unlocks the 130+ field calculators, kill sheets, cement job sheets, gain/loss sheets, LCM build sheets, location volumes and chemical inventory. Start with a 3-day free trial, then $3.99 per month or $19.99 per year. It all works with no signal. SHARE WITH YOUR CREW Keep one set of figures in front of everybody on location. Share tank gauge readings, chemical inventory, notes, LCM build sheets, kill sheets and cement jobs with the hands you work with, and every phone stays in step. Anything entered with no signal goes up when you have coverage, and your records stay private until you choose to share them. 130+ CALCULATORS Drilling engineering: capacities, volumes, string displacement, pump output and strokes, circulation times, hydrostatic, gradient, EMW, ECD, MAASP, lag time and ROP. Drilling fluids: mud weight conversions, oil/water ratio, weighted mixing, barite and hematite addition, dilution, PV, YP, gel strength, API fluid loss, retort solids and alkalinity. Solids control: solids percentage, low and high gravity solids, dilution and discard volume, screen mesh, centrifuge and hydrocyclone. Cementing: slurry yield and density, mix water, additives by percent BWOC, sacks, annular volume with hole excess, top of cement, balanced plug, displacement and strokes. Directional and MWD: minimum curvature, dogleg severity, interpolation, closure and vertical section, build and tangent sections, projections ahead, slide footage and toolface. Well control: formation pressure from SIDPP, kill mud weight, initial and final circulating pressure, the step-down schedule, maximum allowable mud weight from a leak-off test, MAASP, influx height and gas expansion. KILL SHEET A full IADC-style vertical well kill sheet you fill in before you need it. Keep the pre-recorded half current on a quiet tour; if the well is shut in, enter SIDPP, SICP and pit gain and the sheet works the kill with a full step-down schedule. CEMENT JOB SHEET Lay out a primary job end to end: capacities, coverage, barrels, sacks and mix water, the annulus drawn to scale, and a pump schedule with cumulative strokes. Casing presets from 20 to 4-1/2 inch. LCM BUILD SHEET Design a lost circulation pill product by product from your own inventory. Pounds, sacks, concentration and cost per barrel, a stock check against what is on hand, and one tap to record it as used. CHEMICAL INVENTORY A real daily ledger: previous, received, used, transferred in and out, and adjustments for every product, every day. Tomorrow starts where today finished and old days are never overwritten. BUILT FOR THE FIELD Large touch targets and big monospaced results, readable in gloves and in the sun. Dark and light mode, favorites and search. ENGINEERING INTEGRITY Every calculator shows its equation, units, assumptions and a verification status: VERIFIED, NEEDS VERIFICATION or EQUIPMENT SPECIFIC. IMPORTANT Kyanite Engineering is a calculation and reference aid, not a well control program and not a substitute for engineering judgement. All results must be verified by qualified personnel. Well control decisions must follow the operator's and contractor's program and the person in charge on location. Subscriptions renew automatically unless cancelled at least 24 hours before the period ends. Terms: https://qd9gebwlsmhsi73ipf973-web-kyanite-support.rork.live/terms Privacy: https://qd9gebwlsmhsi73ipf973-web-kyanite-support.rork.live/privacy
Screenshots
Verdict
The clearest difference is rating: Kyanite Pro at 5.0 against EMEPA's 3.7. Kyanite Pro also leads on update cadence (every 5 days vs every 6 months). EMEPA's advantage is in-app purchases (none vs 2) and ratings volume (6 vs 1). On price, 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
Both are free to download. Kyanite Pro sells 2 in-app purchases, starting at $3.99 per month. EMEPA asks for nothing beyond the download.
Kyanite Pro holds the better App Store score, 5.0 against 3.7. That said, the two scores are not equally well evidenced: EMEPA has 6 ratings behind it against 1, so its average is the more settled of the two.
EMEPA ships an update every 6 months, Kyanite Pro every 5 days. The most recent releases landed on October 14, 2026 and October 16, 2026 respectively.
| Parameter | EMEPA | Kyanite Pro |
|---|---|---|
| Price | Free | Free |
| Rating | 3.7 (6 ratings) | 5.0 (1 ratings) — better |
| Number of ratings | 6 — better | 1 |
| Update frequency | Every 6 months | Every 5 days — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Freemium |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 12.0 — better | 18.0 |
| Further details — not scored | ||
| Size | 174 MB | 41 MB |
| Age rating | 4+ | 4+ |
| Developer | East Mississippi Electric Power Association | Mike Haynes |
Customer experience
EMEPA
Kyanite Pro
In-app purchases
EMEPA
No in-app purchases
Kyanite Pro
- Kyanite Pro Monthly3 Days trial$3.991 Month
- Kyanite Pro Yearly$19.991 Year









