Tracer Study vs CATT1
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Tracer Study
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This app is based on studying the drinking behavior of volunteering participants with a goal of reducing their alcohol consumption. The study involves analyzing the alcohol triggers, consumption and actions taken under the influence of alcohol as reported by the participants by the means of reporting sections and periodic surveys in the app. This app also helps participants to monitor their blood alcohol content using a breathalyzer and encourages them to add and track their goals.
CATT1
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Event Logger for CATT1 Clinical Trial
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Verdict
The clearest difference is update cadence: Tracer Study at fortnightly against CATT1's every 7 months. CATT1's advantage is iOS requirement (13.0 vs 15.0). On price, ads, in-app purchases and device support 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.
Tracer Study ships an update fortnightly, CATT1 every 7 months. The most recent releases landed on September 18, 2026 and September 26, 2026 respectively.
| Parameter | Tracer Study | CATT1 |
|---|---|---|
| Price | Free | Free |
| Update frequency | Fortnightly — better | Every 7 months |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPod | iPhone, iPod |
| Requires iOS | 15.0 | 13.0 — better |
| Further details — not scored | ||
| Size | 54 MB | 27 MB |
| Age rating | 17+ | 4+ |
| Developer | Vista It Solutions | Integrated Medical Development LLC |
In-app purchases
Tracer Study
No in-app purchases
CATT1
No in-app purchases
Questions
Is Tracer Study free?
Is CATT1 free?
Do Tracer Study or CATT1 have ads?
Which is updated more often, Tracer Study or CATT1?
Other comparisons
