# VPD Tool vs KrypterPQ

The clearest difference is price: KrypterPQ at Free against VPD Tool's $0.49. KrypterPQ also leads on update cadence (every 4 days vs every 2 months). VPD Tool's advantage is iOS requirement (18.5 vs 26.0). On rating, review sentiment, ratings volume and ads there is nothing between them.

KrypterPQ is free to download; VPD Tool costs $0.49 up front. Neither carries in-app purchases, so what you see is what you pay.

On the App Store both sit at effectively the same score — 5.0 for VPD Tool against 5.0 for KrypterPQ. Both are backed by a comparable volume of ratings — 1 and 2 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

VPD Tool ships an update every 2 months, KrypterPQ every 4 days. The most recent releases landed on October 18, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | VPD Tool | KrypterPQ |
| --- | --- | --- |
| Price | $0.49 | **Free** |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/vpd-tool/id6751213834/reviews) | [5.0 (2 ratings)](https://appshunter.io/ios/app/krypterpq/id6757750471/reviews) |
| Number of ratings | 1 | **2** |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 4 days** |
| Monetization | Paid | **Free** |
| Size | 2 MB | 11 MB |
| Requires iOS | **18.5** | 26.0 |
| Devices | iPhone, iPad | **iPhone, iPad, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Nicholas Hwang](https://appshunter.io/developer/1802240669) | [Pavel Yeschenko](https://appshunter.io/developer/1745349056) |

## What reviewers say

### VPD Tool

[App page](https://appshunter.io/ios/app/vpd-tool/id6751213834)

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.

**Highlights:** Interactive VPD heatmap, Stage-specific VPD ranges, Leaf and Air VPD calculation, Home and Lock Screen widgets, On-device calculations, CSV log export

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### KrypterPQ

[App page](https://appshunter.io/ios/app/krypterpq/id6757750471)

Encrypt any file or message with advanced, user-controlled cryptography. Your data is secured using your device's hardware and advanced algorithms, ensuring privacy without middlemen or servers. Share securely, knowing only your intended recipient can access your information.

**Highlights:** Encrypt any file type (photos, documents, videos), Send encrypted text messages, Keys stored in Secure Enclave, Post-quantum encryption (XWing), Password protection for double security, No account or network connection required, Authenticated encryption for sender verification

**In-app purchases:** none


## Frequently asked questions

### Is VPD Tool free?

VPD Tool costs $0.49, with no in-app purchases.

### Is KrypterPQ free?

KrypterPQ is free to download, with no in-app purchases.

### Which has better reviews, VPD Tool or KrypterPQ?

VPD Tool and KrypterPQ are both rated 5.0 out of 5 on the App Store, from 1 and 2 ratings respectively.

### Do VPD Tool or KrypterPQ have ads?

Neither VPD Tool nor KrypterPQ shows ads.

### Which is updated more often, VPD Tool or KrypterPQ?

VPD Tool ships an update every 2 months, and KrypterPQ every 4 days. Most recently, VPD Tool was updated on October 18, 2026 and KrypterPQ on October 25, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*