GROB⁴Line vs CoolSpeed
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
GROB⁴Line
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GROB-NET⁴Industry uses web technology to create cross-plant transparency throughout the production process. The applications within GROB-NET⁴Industry modularly developed by GROB, network and digitalize production processes to facilitate paperless communication – for even greater productivity. Through the management of users and solutions, GROB4Portal is the safe entry to the digital world. GROB4Line allows a GROB machine to be connected to the Internet. Consequently, it can be monitored and controlled via a smartphone. Combined with the notification function which sends messages (e.g. machine shutdown, alarm messages or job finished) to defined smartphones, the machine operator concerned can respond immediately and minimize unnecessary downtimes. • Mobile, dynamic display of machine data • Information about status, alarm messages, tool and NC program at a glance • E-mail notification for machine shutdown • Definition of alarm messages for proactive e-mail notification • Mobile monitoring of unmanned and lightly-manned machine operation • Historical timeline diagram
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
Screenshots
Verdict
The clearest difference is update cadence: CoolSpeed at every 2 weeks against GROB⁴Line's every 2 months. On price, ads, 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.
GROB⁴Line ships an update every 2 months, CoolSpeed every 2 weeks. The most recent releases landed on September 7, 2026 and September 20, 2026 respectively.
| Parameter | GROB⁴Line | CoolSpeed |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 2 months | Every 2 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.0 | 14.2 — better |
| Further details — not scored | ||
| Size | 16 MB | 114 MB |
| Age rating | 4+ | 4+ |
| Developer | GROB-WERKE GmbH & Co. KG | WTO Werkzeug-Einrichtungen GmbH |
In-app purchases
GROB⁴Line
No in-app purchases
CoolSpeed
No in-app purchases









