Cure Puck vs VPD Tool
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Cure Puck
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The Cure Puck app provides users the ability to monitor environmental conditions inside and outside with features of seeing relative humidity, room temperature, chamber temperature and connectivity status. Learn more at www.curepuck.io
VPD Tool
This utility app helps growers understand Vapor Pressure Deficit (VPD) for optimal plant growth. It features an interactive heatmap and stage presets to guide environmental adjustments. Calculations are performed on-device for privacy.
- Interactive VPD heatmap
- Stage-specific VPD ranges
- Leaf and Air VPD calculation
- Home and Lock Screen widgets
- On-device calculations
- CSV log export
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Know your VPD in seconds. Enter temperature & humidity (or tap the interactive heatmap) to see Leaf VPD and Air VPD with scientifically labeled isolines. Choose Seedling / Veg / Flower / Late Flowering to see target VPD ranges and how best to nudge your environment to “ideal.” Why growers love it • Interactive heatmap: drag to explore temperature–humidity combos • Stage presets: recommended VPD bands by plant development stage • Leaf vs Air: leaf–air offset, dew point, absolute humidity • Beautiful widgets: small/medium/large Home & Lock Screen widgets • Private by design: on-device calculations, no account required Details • VPD = es(T) × (1 − RH/100); leaf VPD uses leaf temperature (air + ΔT) • Absolute humidity via water vapor partial pressure (ideal gas law) • Full support for °C/°F, metric/imperial • Export logs to CSV Support Questions or feedback: support@nicksberryfarm.com
Screenshots
Verdict
The clearest difference is price: Cure Puck at Free against VPD Tool's $0.49. Cure Puck also leads on iOS requirement (16.4 vs 18.5). VPD Tool's advantage is update cadence (every 2 months vs every 5 months). On 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
Cure Puck is free to download; VPD Tool costs $0.49 up front. Neither carries in-app purchases, so what you see is what you pay.
Cure Puck ships an update every 5 months, VPD Tool every 2 months. The most recent releases landed on September 11, 2026 and September 14, 2026 respectively.
| Parameter | Cure Puck | VPD Tool |
|---|---|---|
| Price | Free — better | $0.49 |
| Rating | — | 5.0 (1 ratings) — better |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | — | 1 — better |
| Update frequency | Every 5 months | Every 2 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Paid |
| Devices | iPhone | iPhone, iPad — better |
| Requires iOS | 16.4 — better | 18.5 |
| Further details — not scored | ||
| Size | 73 MB | 2 MB |
| Age rating | 17+ | 4+ |
| Developer | Keirton Inc | Nicholas Hwang |
In-app purchases
Cure Puck
No in-app purchases
VPD Tool
No in-app purchases
