PsychroFlow Pro vs Flashlight
Price, ratings, monetisation and update history for both apps, side by side β with what reviewers say about each.
PsychroFlow Pro
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Elevate your HVAC diagnostics with PsychroFlow Pro, the premium calculator designed for field technicians and engineers. Start figuring out "what's happening inside the duct" with laboratory-grade precision. PsychroFlow Pro replaces your old charts and slide rules with a modern, dark-mode interface that works perfectly in dimly lit plant rooms. KEY FEATURES: 1. Advanced Psychrometric Analyzer Visual Chart: See your air state plotted in real-time on a dynamic Psychrometric Chart. Solve Any Scenario: Enter any two variables (Dry Bulb, Wet Bulb, Relative Humidity, or Dew Point) to calculate the rest. Detailed Results: Instantly get Enthalpy, Humidity Ratio (Grains/lb or g/kg), Specific Volume, and Vapor Pressure. 2. Smart Target Charge (Superheat) Fixed Orifice Logic: Determine the target superheat based on indoor and outdoor conditions. Built-in PT Chart: No more flipping between apps. Enter your Gauge Pressure (PSI/kPa) and let the app calculate Saturation Temperature automatically. Multi-Refrigerant Support: R-410A, R-22, R-32, R-407C, R-134a included. Diagnostics: Get instant "Add Charge," "Recover Charge," or "System OK" recommendations. 3. Mixed Air Calculator Precise Mixing: Calculate the resulting temperature and enthalpy when two air streams combine. Perfect for diagnosing economizers and fresh air intakes. 4. Professional Grade Unit Conversion: Toggle seamlessly between Imperial (IP) and Metric (SI) units with one tap. Offline First: Zero dependency on the internet. Calculations happen locally on your device. Dark Mode: A "Gold & Glass" aesthetic designed to be easy on the eyes. Why PsychroFlow Pro? Calculations are based on ASHRAE 2021 Fundamentals formulas for maximum accuracy. Whether you are balancing a commercial layout or charging a residential split system, trust the math behind the tool.
Flashlight
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Your iPhone already carries the brightest light you own β FlashTorch turns it into a proper torch, signal lamp and Morse transmitter you control from one screen. Most flashlight apps are a single button and a wall of ads. FlashTorch is a four-workspace light kit: Torch drives the hardware LED with a precise beam dial, Screen turns the display into a colored lamp, Signal flashes SOS or any message you type in International Morse, and Tools keeps your favorite setups one tap away. It never opens the camera and never asks for camera permission. WHAT YOU GET β’ A steady LED beam you can dim from 100% down to 10% β full glare for the driveway, a soft glow that won't wake anyone β’ Four strobes tuned to a job: Beacon marks your position, Bike keeps you seen on the road, Search finds a dropped earring, Rapid demands attention β’ The standard SOS pattern running hands-free until you stop it β flashed on the screen if your device has no LED β’ A Morse translator: type up to 120 characters and the light spells them out, with the full AβZ reference chart built in β’ A full-screen lamp in six colors with its own brightness dial β red preserves night vision, warm white settles a nursery β’ Presets that store mode, level, color and timer together, so "Low-light red" or "Quick find" is ready before you are out the door PERFECT FOR β’ Campers and hikers who want a beacon, tent lamp and signal light in one pocket β’ Cyclists and dog walkers who need to be seen after dark β’ Boaters and preppers who practice SOS and Morse before they need it β’ Parents who want a dim red or warm glow instead of the ceiling light WHY NOT JUST USE THE CONTROL CENTER FLASHLIGHT? It is one white light at one job. It cannot strobe, cannot flash SOS, cannot spell a message in Morse, cannot tint the screen red for night vision, and will not switch itself off after 15 minutes when you fall asleep. FlashTorch does all of it β and shows a photosensitivity warning before anything flashes. PRIVATE BY DEFAULT Everything runs on your device. No account, no ads, no analytics SDK, no tracking β and no camera access: FlashTorch drives the LED without ever opening a capture session. FULL ACCESS FlashTorch Pro unlocks the beam-level dial, all four strobe presets, Morse message transmission, the five extra screen-lamp colors and the auto-off timers β on a weekly or yearly subscription, or a one-time lifetime purchase. Download FlashTorch before the next power cut, then save a "Blackout" preset so the right light is two taps away. Terms of Use: https://leanstudio.asia/terms-of-use Privacy Policy: https://leanstudio.asia/privacy-policy Support: support@leanstudio.asia
Screenshots
Verdict
The clearest difference is price: Flashlight at Free against PsychroFlow Pro's $1.99. PsychroFlow Pro's advantage is device support (3 vs 1) and iOS requirement (15.1 vs 17.0). On ads and in-app purchases there is nothing between them.
Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS
Flashlight is free to download; PsychroFlow Pro costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.
| Parameter | PsychroFlow Pro | Flashlight |
|---|---|---|
| Price | $1.99 | Free β better |
| Update frequency | β | Every 4 months |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad, iPod β better | iPhone |
| Requires iOS | 15.1 β better | 17.0 |
| Further details β not scored | ||
| Size | 30 MB | 4 MB |
| Age rating | 4+ | 4+ |
| Developer | David Amison | LEAN ASIA CO., LTD |
In-app purchases
PsychroFlow Pro
No in-app purchases
Flashlight
No in-app purchases





