Decrypter vs PARM
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Decrypter
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Do you suspect a secret dimension hidden in your pages? The new Crossed Keys Decrypter is here to help. Society members only.
PARM
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PARM lets you measure light intensity for your plants quickly and easily — using only your iPhone or iPad camera. - Lightweight and fast: built entirely in SwiftUI, optimized for speed and efficiency. - Camera-only: no extra sensors, accounts, or subscriptions required. - Privacy-first: no third-party services, no data collection, everything stays on your device. - Plant-friendly: check PAR (Photosynthetically Active Radiation) values to better understand your plant’s light conditions. - Keep track: save and review your measurements over time. PARM is simple, private, and reliable — on both iPhone and iPad.
Screenshots
Verdict
The clearest difference is price: Decrypter at Free against PARM's $2.99. Decrypter also leads on iOS requirement (12.0 vs 16.0). 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
Decrypter is free to download; PARM costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.
| Parameter | Decrypter | PARM |
|---|---|---|
| Price | Free — better | $2.99 |
| Update frequency | — | Every 6 months |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 12.0 — better | 16.0 |
| Further details — not scored | ||
| Size | 94 MB | 0 MB |
| Age rating | 4+ | 4+ |
| Developer | Sherlocked | Marco Tini |
In-app purchases
Decrypter
No in-app purchases
PARM
No in-app purchases
