Comparison

Trajectory vs Just Weight

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Trajectory

Read full description

Trajectory focuses on long-term direction instead of daily noise, so you can stay consistent without overreacting. TRACK YOUR WEIGHT EFFORTLESSLY • Log your weight in seconds • Supports kg and lbs • Full history STAY ON COURSE • Set a target weight and deadline • See your personal trajectory line • Know exactly where you should be today UNDERSTAND YOUR BODY • BMI tracking with instant feedback • 7-day trend to spot momentum • Progress toward your goal CLEAN & FOCUSED • No subscriptions. Free. • Beautiful chart that tells the whole story Trajectory doesn't judge. It doesn't nag. It just shows you the path, and whether you're on it.

About

Just Weight

Easily log your weight with a simple interface and fun wheel picker. Visualize your progress with clear charts and set personalized weight goals with target dates. Securely sync your data to the cloud and switch between units as needed.

Highlights
  • Quick weight logging
  • Weight history chart
  • Goal plans with progress tracking
  • Weekly weigh-in tracking
  • lbs and kg support
  • Cloud data sync
  • Dark mode support
Read full description

Just Weight makes weight tracking simple. Logging takes about five seconds. Tap, spin the wheel to your weight, and save. The History tab charts your weight by week, month, or year. If you weigh in on a set day each week, you can show only those days to smooth out daily ups and downs. Working toward a number, whether losing or gaining? Set a plan with a goal and a target date. The Plan tab shows whether you're ahead or behind, and how much change per week it takes to get there. Works in lbs or kg. Entries are backed up to your account, so switching phones doesn't mean starting over.

Screenshots

Just Weight4 screens

Verdict

The call

The clearest difference is device support: Just Weight at 2 against Trajectory's —. On price, in-app purchases and iOS requirement there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Scorecard1 real difference · 9 level
Trajectory versus Just Weight: the parameters behind the verdict, then further details
ParameterTrajectoryJust Weight
PriceFreeFree
Rating—5.0 (1 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings—1 — better
Update frequency—Daily
Ads—No
In-app purchasesNoNo
Monetization—Free
Devices—iPhone, iPad — better
Requires iOS18.517.0 — better
Further details — not scored
Size2 MB3 MB
Age rating17+4+
DeveloperMathieu BonteDesoto Labs LLC

In-app purchases

None

Trajectory

No in-app purchases

None

Just Weight

No in-app purchases

Questions

Is Trajectory free?
Trajectory is free to download, with no in-app purchases.
Is Just Weight free?
Just Weight is free to download, with no in-app purchases.

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