USA Unit Converter vs Trajectory
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
USA Unit Converter
Read full descriptionHide full description
Confused about measuring units in American videos? Traveling to Europe from the U.S.? USA Unit Converter is the best choice! The most convenient and quick way to convert from Imperial units to International system and vice versa. Create and customize widget for easy access to the most frequently used units. Why USA Unit Converter? – Speed. You don't need to waste time searching through the categories. You have access to all the units right after opening the app – Widget. Memorize units with our widgets. You can customize count of rows in a widget and frequency of unit updates – No limits. Enjoy all of the features for free with NO ADS
Trajectory
Read full descriptionHide full description
Detects the trajectories of shapes moving along a parabolic path
Screenshots
Verdict
The clearest difference is ads: USA Unit Converter at none against Trajectory's shown. Trajectory's advantage is update cadence (fortnightly vs every 14 months). On price, in-app purchases, device support 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
USA Unit Converter ships an update every 14 months, Trajectory fortnightly. Both last shipped on September 8, 2026.
| Parameter | USA Unit Converter | Trajectory |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 14 months | Fortnightly — better |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Devices | iPhone, iPad — better | iPhone |
| Requires iOS | 17.0 — better | 17.7.2 |
| Further details — not scored | ||
| Size | 2 MB | 36 MB |
| Age rating | 4+ | 4+ |
| Developer | Andrey Seleznev | Hideaki Uchikoshi |
In-app purchases
USA Unit Converter
No in-app purchases
Trajectory
No in-app purchases
Questions
Is USA Unit Converter free?
Is Trajectory free?
Do USA Unit Converter or Trajectory have ads?
Which is updated more often, USA Unit Converter or Trajectory?
Other comparisons
