CO2 Level Tracking App: Does One Exist?
Yes — CO2 tracking exists as a feature inside grow-tracking apps, though it is far less common than temperature or humidity tracking because fewer growers own a CO2 meter. GrowScope is one of the apps that does it, and it does something most generic meters and their companion apps don't: it calculates what your target should be, rather than just storing what you measured. Here is how it works, question by question.
Is there an app for tracking CO2 levels?
Yes — but with a nuance worth knowing. A CO2 meter is a physical device, and many ship with their own companion apps that display and chart readings from that specific hardware. What is rarer is a grow-tracking app that treats CO2 as part of the plant's record — logged alongside climate readings, compared against a target, and connected to the plant's growth stage and light. GrowScope takes that second approach: it does not sell you hardware or pair with a sensor, but once you own any CO2 meter, it gives the readings a home next to everything else you track, plus the one thing a standalone meter app never tells you — what the number should actually be for your plant, your light, and your stage.
How does CO2 tracking work in GrowScope?
It starts with a toggle. In equipment settings, you enable 'Has a CO2 meter' — without that, the CO2 field and its weekly reminder simply don't appear, so the app never nags someone who doesn't own a meter. With the toggle on, you log a CO2 ppm reading alongside your regular climate readings, roughly weekly. The Box section then shows a CO2 panel with your target range, calculated automatically from your plant's recent average PPFD and its current growth stage — you never set the target yourself; you only supply the measured reading. The app's AI equipment-placement advisor also reads your last CO2 reading as context, so the number you log feeds back into the advice the app gives.
Why is the target calculated instead of set by me?
Because a CO2 target that ignores light is meaningless. Extra CO2 is only usable when photosynthesis has light to spare, so the same ppm that is a sensible target for a brightly lit plant is waste for a dimly lit one — which is why GrowScope derives the target range from your plant's recent average PPFD: more usable light means a higher enrichment target, and a light-limited plant gets no enrichment target at all. Growth stage caps the range too, and enrichment is deliberately not recommended during late flower or the seedling stage regardless of light level. If you have ever looked at a generic 'set it to X ppm' chart and wondered whether it applied to your tent, this is the app's answer: your target comes from your light and your plant, not from a chart.
Does it estimate how long a CO2 cylinder will last?
Yes — this is the part most tracking apps don't attempt. Alongside the target, GrowScope's CO2 panel estimates cylinder consumption: you select your tent's ventilation mode — sealed, closed-but-leaky, sensor-controlled exhaust, or exhaust running continuously — and the app calculates a one-time-fill estimate, a leak-compensation rate, a daily consumption figure, and how long a cylinder will last under that setup. The estimates exist precisely because consumption varies enormously with ventilation: a sealed tent sips CO2 while a continuously vented one pours it outside. And because the readings are logged, there is also a safety warning when ppm rises above human-safe levels — the check that matters even more than cylinder economics, since CO2 enrichment is a human-health question before it is a plant one.
How GrowScope helps
GrowScope's CO2 tracking covers the whole loop described here: enable 'Has a CO2 meter' in equipment settings, log ppm readings weekly with your climate readings, and the Box section's CO2 panel shows the target calculated from recent average PPFD and growth stage, cylinder consumption and duration estimates for your selected ventilation mode, and a safety warning above human-safe ppm levels. The last CO2 reading also feeds the AI equipment-placement advisor as context.
Key takeaway
CO2 tracking apps exist — GrowScope tracks ppm readings you log with any meter, calculates the target range automatically from your plant's recent light and growth stage, estimates cylinder duration from your ventilation mode, and warns above human-safe ppm levels.