Snap your lifting weights, and "explain my gap"

10 July 2026 · 5 min read

Two small things take friction out of a training week. Mid-set, you can fill in the weight you're lifting straight from a photo instead of tapping at a keypad — and when the number on the scale stops matching what your calorie deficit predicted, you can ask your AI Coach to explain the gap as a proper conversation, not a canned answer.

Strathlon calorie-deficit chart with predicted versus actual weight

Snap to fill your lifting weights

In the middle of a set, the last thing you want is to fiddle with a keypad. So you don't have to. On an exercise's weight panel, tap "Snap to fill" and point your camera at whatever tells you the load — the number stamped on a dumbbell, the plates on the bar, a machine's display, or the weight you've scribbled in a paper logbook. The coach reads the number and fills in your working weight, and the reps along with it.

It reads real equipment. Dumbbells, plates, cable stacks, machine screens, or your own handwritten log — you point, it reads.
You see what it read. The number it picked up is filled in for you to glance at, so a misread is a one-tap correction rather than a re-type.
It keeps you in the set. A photo instead of a keypad means you log the weight without breaking your rhythm between sets — the accurate record happens on its own.

An accurate weight log is what lets Strathlon track your training volume properly over time, so the less it costs you to record it, the more useful the picture becomes.

"Explain my gap"

Strathlon draws two lines on your Tracker: your predicted weight, worked out from the calorie deficit you've been tracking, and your actual weight from the scale — and if your scale syncs to Apple Health, those weigh-ins flow in automatically, with no "update your weight?" tap to confirm. Early on the two lines often disagree, and that's completely normal. Water and glycogen make real weight drop faster than the maths expects at first, so the scale runs ahead of the prediction; later, your body adapts and the prediction can run ahead of the scale. A gap between the two lines isn't a mistake — it's information. The useful question is why.

When the two lines diverge, tap "explain my gap". It opens a real conversation in your AI Coach with your numbers already loaded — you don't have to explain your own history to it.

Rather than firing back a guess, it looks at the things that actually move the needle: how many days you logged food, how consistent your weigh-ins have been, and your sleep. Then it usually asks you a question or two before it suggests what's going on. It asks before it guesses — and because it's a proper chat, you can answer, and keep going until the picture makes sense.

Example: Two weeks in, your scale has barely moved, but your deficit says it should have. You tap "explain my gap". The coach can already see you logged food most weekdays but almost nothing on weekends, and that your sleep dipped for a stretch. Before it concludes anything, it asks how your weekends tend to go and whether those short nights were typical. You mention two big weekend meals out and a poor run of sleep — and it explains how unlogged weekends and disrupted sleep can flatten the scale for a couple of weeks even when your weekday deficit looks perfect, then suggests what to watch next.

Both "Snap to fill" for your lifting weights and "explain my gap" are part of the premium AI Coach, which comes with a 14-day free trial. The weight and deficit tracking themselves are free — you can watch both lines on your Tracker without a subscription.

Want more on the coach and the charts these features build on? See Your AI Coach and Reading your charts.

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