NORTON iGRIND vs SumiTool Calculator
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
NORTON iGRIND
This app provides essential calculators and conversion tools for grinding processes. It helps users determine starting parameters for wheel truing, optimize coolant delivery, and convert wheel speeds for safe operation.
- Grinding wheel truing parameter calculator
- Coolant delivery setup optimization
- Wheel speed conversion (RPM, SFPM, M/Sec)
- Safe grinding operation tools
- Expert-created calculations
Read full descriptionHide full description
Support your grinding process with calculators and conversion tools created by Norton experts. With Norton iGrind you can calculate the starting parameters for traverse truing your grinding wheel, determine the ideal setup for delivering coolant to the grinding zone, or convert wheel speeds between RPM, SFPM (Surface Feet Per Minute), and M/Sec to ensure a safe grinding operation.
SumiTool Calculator
This app simplifies complex machining calculations for turning, milling, and drilling. Users select an operation, input figures, and receive automatic results. It allows saving calculations for logs and comparing two results simultaneously.
- Automatic calculation for turning, milling, drilling
- Customizable item display order
- Save calculation results
- Log viewing
- Side-by-side result comparison
Read full descriptionHide full description
The Sumitomo Electric calculation function app "Sumitool Calculator" handles the complex equations used for turning, milling, and drilling. To use it, just select the required item and enter the figures for automatic calculation. The item display order comes with a sort function, enabling customization according to use frequency. The calculation results can also be saved in the terminal, allowing log viewing and comparison of two results side by side.
Screenshots
Verdict
The clearest difference is rating: NORTON iGRIND at 5.0 against SumiTool Calculator's 1.0. NORTON iGRIND also leads on ads (none vs shown) and update cadence (monthly vs every 8 months). SumiTool Calculator's advantage is iOS requirement (10.0 vs 14.0). On price, in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.
NORTON iGRIND holds the better App Store score, 5.0 against 1.0. That said, the two scores are not equally well evidenced: NORTON iGRIND has 5 ratings behind it against 1, so its average is the more settled of the two.
NORTON iGRIND ships an update monthly, SumiTool Calculator every 8 months. The most recent releases landed on October 14, 2026 and October 6, 2026 respectively.
| Parameter | NORTON iGRIND | SumiTool Calculator |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (5 ratings) — better | 1.0 (1 ratings) |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 5 — better | 1 |
| Update frequency | Monthly — better | Every 8 months |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Monetization | Free — better | Ad-supported |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 14.0 | 10.0 — better |
| Further details — not scored | ||
| Size | 20 MB | 51 MB |
| Age rating | 4+ | 4+ |
| Developer | Saint-Gobain | SUMITOMO ELECTRIC INDUSTRIES,LTD. |
Customer experience
NORTON iGRIND
SumiTool Calculator
In-app purchases
NORTON iGRIND
No in-app purchases
SumiTool Calculator
No in-app purchases
Questions
Is NORTON iGRIND free?
Is SumiTool Calculator free?
Which has better reviews, NORTON iGRIND or SumiTool Calculator?
Do NORTON iGRIND or SumiTool Calculator have ads?
Which is updated more often, NORTON iGRIND or SumiTool Calculator?
Other comparisons
