LTQ vs GEMS Study
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
LTQ
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LTQ-H is a digital therapeutic for smoking cessation only available to participants of a clinical trial conducted at Wake Forest University.
GEMS Study
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GEMS is designed to help people make informed choices about their health. The app is only intended for use by participants in the GEMS study. It is not intended for the general public. App activation and use requires an access code and verification of study participants’ identity. GEMS participants must install and set up the app to complete study enrollment.
Screenshots
Verdict
The clearest difference is iOS requirement: LTQ at 12.0 against GEMS Study's 17.0. On price, update cadence, ads and in-app purchases 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.
Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on September 17, 2026 and September 24, 2026 respectively.
| Parameter | LTQ | GEMS Study |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 2 months | Every 2 months |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPod — better | iPhone |
| Requires iOS | 12.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 684 MB | 152 MB |
| Age rating | 17+ | 17+ |
| Developer | Roger Marcelo Vilardaga Viera | Kaiser Permanente |
In-app purchases
LTQ
No in-app purchases
GEMS Study
No in-app purchases
