The device question, answered

Yes: almost any phone from the last several years is good enough for a rating tool, as long as you use it to give the same result twice. The question people usually mean - whether their phone is holding them back from a higher score - has the same answer: it probably is not.

Sufficiency is about consistency, not capability

A rating model reads a photo, not a camera spec sheet. Above a fairly low resolution and quality floor, more megapixels or a better sensor do not move a rating - they mostly stop mattering once the image is clear enough for the rubric to read what it needs. What the model actually does with that image does not distinguish a flagship phone from a mid-range one; it distinguishes a clear image from a blurry, compressed, or badly lit one. That split matches the research: Dodge and Karam (2016) tested image-classification networks against blur, noise, contrast and JPEG compression and found them susceptible to quality distortions, "particularly to blur and noise".

The condition that matters is holding the device constant. Phones with more than one rear lens switch between them depending on how close you stand, and each lens renders proportion differently. Software processing - portrait mode, auto-HDR, colour smoothing - varies by app and by phone model, and it changes the image before the rubric ever sees it. None of that is a capability problem. It is a consistency problem, and it is solved by using the same phone, the same camera app, and the same manual settings every time rather than by buying a better one.

What upgrading actually resets

A new phone is a new lens, new processing, and often a new default colour profile, all at once. That breaks comparability with everything shot on the old device, which is the same argument made in more depth for keeping one device across a series, and it is why the device you already have a series on beats a nominally better replacement. If the current phone gives a workable image, the upgrade case is about photography convenience, not about the rating.

This does not compete with what serious measurement work requires, where purpose-built gear exists for a reason a phone camera cannot substitute for. A rating result and a physical measurement are answering different questions, and the phone-is-enough answer applies only to the first one. It also has nothing to do with what a human reviewer might prefer to receive - that is a presentation question, and this is a repeatability one.

The one condition, spelled out

Same phone, same physical lens - not the wide-angle one this time and the standard lens next time - and the same manual exposure and focus settings if the camera app allows locking them. Auto-everything is the enemy here, not because auto modes take worse photos, but because they take differently-processed photos each session depending on what the scene happened to look like that day. A locked, repeatable configuration on a merely adequate phone beats an unlocked, auto-everything configuration on the newest one.

Fix the device, fix the settings, and the phone in your pocket right now is good enough for whatever tool you point it at, Rate Cock included.