GRK 1822 vs D
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
GRK 1822
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Smart tool for balancing of heating and cooling systems. Balancing valves of heading European producers included. Successfully can be used for measuring of very small differential and gauge pressure.
D
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This app allows the user to record and share job logs and view real-time ppm readings on your mobile phone or tablet. App features: * Record and share leak info with job log function * Add GPS location, photos, and notes to your job logs and export in a professional pdf report * View real-time ppm readings for when you can’t see the D-TEK Pro display * Listen for alarms through any headphones connected to your phone * Over the air updates for D-TEK Pro firmware
Screenshots
Verdict
The clearest difference is iOS requirement: D at 15.1 against GRK 1822's 17.0. On price, 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
GRK 1822 ships an update every 4 months, D every 5 months. The most recent releases landed on October 17, 2026 and October 28, 2026 respectively.
| Parameter | GRK 1822 | D |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 4 months — better | Every 5 months |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad | iPhone, iPod |
| Requires iOS | 17.0 | 15.1 — better |
| Further details — not scored | ||
| Size | 43 MB | 23 MB |
| Age rating | 4+ | 17+ |
| Developer | SV Technics | INFICON |
In-app purchases
GRK 1822
No in-app purchases
D
No in-app purchases
