CoolSpeed vs GM Pro AF
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
CoolSpeed
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Official app to use with WTO CoolSpeed® MAX high-speed spindles and WTO Bluetooth pressure gauges for turbine-driven CoolSpeed® high-speed spindles. The app displays the current speed, vibration, temperature and coolant pressure of the high-speed spindles. More functions: - The CoolSpeed® calculator supports the optimum use of CoolSpeed® high-speed spindles - Display of power in watts
GM Pro AF
This app instantly configures running parameters for machining cutters, calculating RPM, IPM, SFM, and Chimp-Loads for various materials. It provides confidence and swagger for shop floor operations and allows sharing of findings.
- Instant configuration of running parameters
- Calculates RPM, IPM, SFM, and Chimp-Loads
- Supports a wide variety of machining materials
- Quick calculations without lengthy questionnaires
- Share machining findings
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The Gorilla Machinist Pro App immediately configures running parameters to put you right in the wheelhouse of all the Gorilla Mill family of cutters. Accurate, dependable, and living on the hairy edge for those “other” end mill and drill lines. RPM, IPM, SFM and Chimp-Loads are calculated at the blink of an eye. A wide variety of machining materials, with no cumbersome long-winded questionnaire asking if all the planets are aligned or if your coolant stinks. And now it’s new and improved! WHAT you say? Yerp, it’s chalked full of calculations and formulas for everything machining so you too can be a “Rock Star” on the shop floor. Walk onto the shop floor with the confidence and swagger of Connor McGregor walking into the Octagon. Share your findings with friends, co-workers, and family…or DON”T and just tell folks it’s all in your noodle upstairs!
Screenshots
Verdict
CoolSpeed and GM Pro AF are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.
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.
CoolSpeed ships an update every 2 weeks, GM Pro AF every 3 weeks. The most recent releases landed on September 20, 2026 and September 2, 2026 respectively.
| Parameter | CoolSpeed | GM Pro AF |
|---|---|---|
| Price | Free | Free |
| Rating | — | 4.5 (2 ratings) — better |
| Number of ratings | — | 2 — better |
| Update frequency | Every 2 weeks — better | Every 3 weeks |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 14.2 — better | 15.0 |
| Further details — not scored | ||
| Size | 114 MB | 53 MB |
| Age rating | 4+ | 4+ |
| Developer | WTO Werkzeug-Einrichtungen GmbH | Gorilla Tools, Inc |
In-app purchases
CoolSpeed
No in-app purchases
GM Pro AF
No in-app purchases








