Comparison

Tether vs Kyanite Pro

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

Head to head
About

Tether

Seamlessly integrate your mobile device with your Linux desktop. Share clipboards, transfer files, and discover your desktop locally over Wi-Fi. All communication is secured with end-to-end encryption, with no cloud servers or accounts needed.

Highlights
  • Shared Clipboard Sync
  • Bi-directional File Transfers
  • Local Network Discovery
  • End-to-End Encryption
  • No Cloud Services Required
Features
Read full description

Tether is an app designed for Linux users running custom desktop environments (Wayland). It provides essential ecosystem integration between your mobile device and your workstation, operating entirely over your local Wi-Fi. There are no cloud servers, third-party services, or accounts required. All data is routed strictly on your local network and secured with end-to-end mTLS encryption. Features: • Shared Clipboard: Sync clipboard text bi-directionally between your iPhone and your Linux machine. • File Transfers: Send documents, photos, and archives directly to your desktop, or receive files from it. • Local Discovery: Uses mDNS/Bonjour to automatically find your desktop - no static IP configuration needed. • Encrypted Connections: Device pairing and all network traffic are secured via mutual TLS certificates. Note: Tether is the iOS client app. To use it, simply run the free, open-source Tether desktop application (available as a CLI or GTK app) on your Linux machine. Visit the project's repository to download it and get started.

About

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.

Highlights
  • 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
Features
Read full description

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

Tether3 screens
Kyanite Pro4 screens

Verdict

The call

The clearest difference is in-app purchases: Tether at none against Kyanite Pro's 2. Kyanite Pro's advantage is iOS requirement (18.0 vs 26.1). On price, rating, ratings volume and update cadence 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. Kyanite Pro sells 2 in-app purchases, starting at $3.99 per month. Tether asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for Tether against 5.0 for Kyanite Pro. Both are backed by a comparable volume of ratings — 2 and 1 respectively.

UpkeepUpdate frequency

Tether ships an update weekly, Kyanite Pro every 5 days. Both last shipped on October 1, 2026.

Scorecard3 real differences · 7 level
Tether versus Kyanite Pro: the parameters behind the verdict, then further details
ParameterTetherKyanite Pro
PriceFreeFree
Rating5.0 (2 ratings)5.0 (1 ratings)
Positive reviews100.0% of reviews—
Number of ratings2 — better1
Update frequencyWeeklyEvery 5 days — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFreemium
DevicesiPhoneiPhone, iPad — better
Requires iOS26.118.0 — better
Further details — not scored
Size6 MB41 MB
Age rating4+4+
DeveloperZack BartelMike Haynes

Customer experience

Tether

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Kyanite Pro

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Tether

No in-app purchases

2 purchases

Kyanite Pro

Subscriptions2
  • Kyanite Pro Monthly3 Days trial$3.991 Month
  • Kyanite Pro Yearly$19.991 Year

Questions

Is Tether free?
Tether is free to download, with no in-app purchases.
Is Kyanite Pro free?
Kyanite Pro is free to download, with in-app purchases available.
Which has better reviews, Tether or Kyanite Pro?
Tether and Kyanite Pro are both rated 5.0 out of 5 on the App Store, from 2 and 1 ratings respectively.
Do Tether or Kyanite Pro have ads?
Neither Tether nor Kyanite Pro shows ads.
Which is updated more often, Tether or Kyanite Pro?
Tether ships an update weekly, and Kyanite Pro every 5 days. Most recently, Tether was updated on October 1, 2026 and Kyanite Pro on October 1, 2026.

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