# Trendcurve > App for iPhone and Android for your weight trend: smoothed instead of daily noise Trendcurve is an app for iPhone and Android made in Germany for people who track their weight over longer periods. Instead of judging the heavily fluctuating daily reading, the app smooths measurements with the selected method (exponential smoothing by default, alternatively a 7 or 14 day average or double exponential smoothing), shows the change against the previous week and derives a target date from the current weekly rate. Since version 1.5.0 the app is organised in four tabs (Today, Goal, Analysis, History) and offers, for free, sharing the trend and milestones as an image, experiments and markers, optional medication tracking for a weekly medication and a corridor for maintaining the goal weight. Pro adds a calorie budget, plateau detection, experiment results, the weekly rate per dose step, the corridor early warning and progress photos. Trendcurve records and calculates but gives no medical recommendations. All weight and health data stays on the device; there is no server of its own and no account, and anonymous usage analytics without health values can be switched off. - Platform: iOS (iPhone) and Android - Current version: 1.6.0 - Download: App Store (https://apps.apple.com/us/app/trendcurve/id6809206142) and Google Play (https://play.google.com/store/apps/details?id=com.jmdev.kilotrend) - Languages: German, English, French, Spanish, Italian, Portuguese, Dutch, Swedish, Norwegian and Danish - Price: Free with an optional Pro upgrade (subscription or one time purchase) - Website: https://trendcurve.app - Units: kilograms, pounds or stones - Category: Health & Fitness ## Free tools for your weight Small tools that use the same calculations as the Trendcurve app. They run entirely in your browser: your values are never uploaded and you don't need an account. - [Free tools for your weight](https://trendcurve.app/en/tools) - [Trend weight calculator](https://trendcurve.app/en/tools/trend-weight-calculator): Paste your weigh-ins or load an export. You get your trend line, weekly rate, typical daily fluctuation and, if you like, a goal date. - [Weight fluctuation: is it normal?](https://trendcurve.app/en/tools/weight-fluctuation-calculator): Paste your weigh-ins or load an export: see how far your weight swings around your trend, your biggest outliers and whether recent weeks were calm or unsettled. - [TDEE from your weight trend](https://trendcurve.app/en/tools/tdee-calculator): Enter your weigh-ins and average calorie intake: the calculator shows your real expenditure from the change in your trend, plus the budget for your target pace. - [Calorie deficit and goal date](https://trendcurve.app/en/tools/calorie-deficit-goal-date-calculator): Enter a target pace and see your goal date, or pick a date and get the pace it takes. Plus the daily deficit and a warning if the pace is too fast. - [GLP-1: compare with the trials](https://trendcurve.app/en/tools/glp1-weight-loss-comparison): Your course on semaglutide or tirzepatide next to the verified means from STEP 1 and SURMOUNT-1, with placebo, spread and sources. - [BMI chart by height](https://trendcurve.app/en/tools/bmi-chart-by-height): Enter your height and see which weight belongs to which WHO category. Plus the complete chart from 150 to 200 cm, in kg, lb or stone. - [Weekly average weight](https://trendcurve.app/en/tools/weekly-average-weight-calculator): Paste your weigh-ins or load an export: you get the average for every calendar week, the change vs last week in weight and percent, and your trend weight for comparison, also as CSV. - [Bulk and cut rate](https://trendcurve.app/en/tools/lean-bulk-rate-calculator): Pick a phase, set a target rate in percent or kg/lb per week and paste your weigh-ins: the calculator shows whether your trend is inside your range and estimates your energy balance. ## Trendcurve compared Fair comparisons with other weight trend apps, with sources and a check date (last checked: October 2026). Information about other apps may change; Trendcurve is not affiliated with the apps mentioned. - [Trendcurve compared](https://trendcurve.app/en/compare) - [Trendcurve vs. Happy Scale](https://trendcurve.app/en/compare/happy-scale-alternative): According to the App Store, Happy Scale is available for iPhone, iPad and Mac; we found no Android version. Trendcurve runs on iPhone and Android and imports the CSV file from Happy Scale. - [Trendcurve vs. Libra](https://trendcurve.app/en/compare/libra-alternative): Libra is available for Android and iPhone, with a Libra Cloud account and ads in the free version. Trendcurve works without an account and without ads and imports the CSV file from Libra. - [Trendcurve vs. MacroFactor](https://trendcurve.app/en/compare/macrofactor-alternative): MacroFactor is a nutrition and coaching app with food logging and no free version. Trendcurve focuses on the weight trend, can be used for free and has no food logging. ## Documentation - [Full information](https://trendcurve.app/en/llms-full.txt) - [Deutsche Fassung](https://trendcurve.app/de/llms.txt) ## Topics around your weight trend Here you find Trendcurve's articles and calculators sorted by topic. Each topic starts with the key points at a glance and then leads to the matching articles. - [Topics around your weight trend](https://trendcurve.app/en/topics) - [GLP-1 medication](https://trendcurve.app/en/topics/glp1-weight-loss): Reading your weight curve on semaglutide or tirzepatide: dose steps, weekly rate, flat phases and maintenance afterwards. - [Weight loss with trend weight](https://trendcurve.app/en/topics/weight-loss): Understand daily fluctuations, spot plateaus, plan deficit and pace, and keep your goal weight afterwards. - [Bulk & Cut: fitness and weight](https://trendcurve.app/en/topics/bulk-and-cut): Water after training, creatine, body fat and maintenance calories: reading your weight the right way when you train. - [Glossary: weight and weight loss terms](https://trendcurve.app/en/glossary): Trend weight, plateau, TDEE, dose marker and more, each explained briefly and clearly.