You have been tracking weight and food, but one question keeps coming back: when might I reach my goal?
Many apps answer with a broad range — "a few months" — that does not change much as your real pace shifts week to week.
Weight Forecast does something simpler: it fits a straight line through your recent weigh-ins and projects an approximate goal date at your current pace. When your trend changes, the date moves.
Why a moving estimate helps
Weight loss is not perfectly linear. Daily scale readings bounce around from water, meals, and activity. A single weigh-in rarely tells the whole story.
What helps is a trend — a line through several weigh-ins that smooths out the noise and gives you a date you can plan around, even if that date shifts as you log more data.
How the estimate is calculated
Weight Forecast uses linear regression on your weight history:
- You log your weight (morning weigh-ins are usually the most consistent)
- The app fits a line through your recent entries (last 7, 14, or 30 weigh-ins)
- It projects that line forward to your goal weight
- It shows an estimated date, e.g. "At your current pace, around mid-June"
The app needs at least 3 weigh-ins before it can show an estimate. With more data, it also shows a high, medium, or low confidence label based on how clear the trend is.
It updates when you log
The estimate is not fixed at signup. It recalculates when you add weigh-ins, so a slower or faster week changes the projected date.
That feedback can make daily logging feel more concrete: you see how your trend — not just today's number — affects the finish line.
What to expect in the first weeks
When you start, the app asks for your current and goal weight. Until you have enough weigh-ins, any date shown is a rough placeholder, not a personalized trend.
After a week or two of consistent logging, the line has enough points to reflect your pace rather than a generic assumption.
Free to start
Weight Forecast is free for core tracking, the goal-date estimate, meal logging, and cloud sync. No credit card required to start.
The bottom line
You do not need a guaranteed date — you need a realistic estimate from your own data that updates as you go.
Weight Forecast fits a linear trend through your weigh-ins, shows an approximate goal date, and refreshes it whenever you log. The question is not "when will I hit my goal for sure?" — it is "what does my trend suggest today?"