Go Calc vs Max Drilling
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Go Calc
Build custom calculator apps for your business directly on your iPhone or iPad. Easily create calculators for specific business needs using spreadsheet-like formulas. Save time and get accurate answers for estimating, pricing, and more.
- Create custom calculator apps
- Use spreadsheet-like formulas
- Define variables and formulas
- Over 50 built-in functions
- Import and export calculations
- Share calculators with others
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EMPOWER YOUR BUSINESS - Throw away your old calculators. Transform everyday calculations. Create calculators for your business right on your iPhone or iPad. Create your own calculator apps right on your iPhone or iPad. In minutes your business specific calculations become a breeze. Create a calculator for each type of problem you need to solve using formula similar to those found in spreadsheets. Go Calc has been helping businesses like yours get the right answers since 2008: "It turned into a mission-critical app when I created a set of formulas for all my estimating and billing." "I own a Retail store and have to work out margins every day." "I use this app nearly every day for scuba gas blending. It saves a huge amount of time." "I have several elaborate pricing formulas that I use at work. ... I can quickly adjust two simple numbers, my price and my markup ... and give me a suggested price." "I created several functions that make it easier to interpret logistic regression results, and it works like a charm!" "I work in the Road Construction industry and have not found anything close to this app." "This app has made my job so much easier and almost fun." Examples of calculators you could create: * Quickly work out potential profit when negotiating with a customer * Estimate costs using a set of business specific variables * Determine how much of a consumable you need Go Calc allows you to quickly create new calculations by setting up variables and formulas on your iPhone or iPad. Creating a new calculator is easy: 1. Tap to add a new calculator 2. Give it a name 3. Add some variables (the inputs to the calculations) 4. Create one or more formulas to get your results 5. Go Calc! Each calculator you create can be reused again and again. Calculators can be easily found by filing them into categories. Formulas in Go Calc share much with the formulas you write in your favorite spreadsheet. Over 50 functions can be used including IF, MAX, SIN, LOG, IPMT, RANDBETWEEN. Import and export your calculations. Backup all your calculations easily and without the need to install any software on your PC or Mac. Create calculators and then share them with other Go Calc users in your business.
Max Drilling
Monitor drilling operations in real-time with instant access to active and historical well data. Visualize drilling parameters, view rig reports, and communicate securely with your team from anywhere.
- 1-second data streaming
- Customizable data visualization
- Time and depth views
- Lagged channel tracing
- Rig and well reports
- Integrated chat
- Collaborative notes
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The new Max Drilling mobile app (formerly WellData MobileRT) provides easy access to active and historical well data so you can monitor your drilling operations from wherever you are. With NOV’s edge infrastructure and M/D Totco instrumentation, your data flows securely from sensor to screen—no third parties involved—so you see it instantly, in real time, with one-second resolution. Key Features: • 1-second data streaming: View real-time drilling data on your mobile device with less than a second of lag between the rig site and your screen (excluding satellite latency). • Customizable visualization: Configure strip charts and traces with flexible options for units, scaling, and more. All tags and channels available in the RigSense Electronic Drilling Recorder (EDR) are accessible, including data from integrated applications like Drilling Beliefs & Analytics and 3rd-party survey data. • Time and depth views: Access both active and historical well data by time or depth for full operational visibility. • Lagged channel tracing: Monitor channels such as gamma ray, methane, propane, total gas, and total gas normalized. • Rig and well reports: View IADC Reports (toursheets), Drilling Contractor Morning Reports, and well information including Bit Records and BHA Summaries. • Integrated chat: Communicate instantly between the rig and other Max Drilling mobile users. • Collaborative notes: View all rig notes or add your own to the official EDR notes in the time-series data. • Secure and compliant: Built on SOC 1 Type II–audited processes and end-to-end SSL/TLS encryption for secure access from anywhere. • Rig locations: View your wells on a map for quick spatial awareness and access directions to the location. • (Coming Soon) Integrated chat: Communicate instantly between the rig and other Max Drilling mobile users. If you experience any difficulties installing or using Max Drilling, please contact the Help Desk at WellDataSupport@nov.com or 1-855-935-5328.
Screenshots
Verdict
The clearest difference is price: Max Drilling at Free against Go Calc's $9.99. Go Calc's advantage is rating (4.4 vs 3.2) and review sentiment (92% vs 63%). 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
Max Drilling is free to download; Go Calc costs $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Go Calc holds the better App Store score, 4.4 against 3.2. Both are backed by a comparable volume of ratings — 19 and 22 respectively. Written reviews point the same way: 92% of Go Calc's written reviews are positive against 63% of Max Drilling's.
Go Calc ships an update every 3 months, Max Drilling every 4 months. The most recent releases landed on October 15, 2026 and October 10, 2026 respectively.
| Parameter | Go Calc | Max Drilling |
|---|---|---|
| Price | $9.99 | Free — better |
| Rating | 4.4 (19 ratings) — better | 3.2 (22 ratings) |
| Positive reviews | 92.0% of reviews — better | 62.5% of reviews |
| Number of ratings | 19 | 22 — better |
| Update frequency | Every 3 months — better | Every 4 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Free — better |
| Best chart rank | #191 — better | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 13.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 2 MB | 208 MB |
| Age rating | 4+ | 4+ |
| Developer | Apps On The Move Limited | NOV Inc. |
Customer experience
Go Calc
Max Drilling
In-app purchases
Go Calc
No in-app purchases
Max Drilling
No in-app purchases








