Comparison

Study Scavenger vs eResearch

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

Head to head
About

Study Scavenger

Discover clinical research studies you may qualify for. Filter by location and personal health details like age and existing conditions. Find opportunities to participate in medical research.

Highlights
  • Find clinical research studies
  • Filter by location
  • Filter by personal health information
  • Qualify for studies
  • Research participation
Read full description

App to help research subjects to find clinical research studies that they qualify for based on location or personal health information such as age and health diseases.

About

eResearch

Participate in clinical research from home to help advance smoking cessation and harm reduction. This platform connects volunteers with studies focused on nicotine addiction, offering remote participation, online consent, and compensation. Advance science and contribute to a healthier future.

Highlights
  • Volunteer registration for nicotine users
  • Online eConsent process
  • Compensation for participation
  • Remote study assessments
  • Telemedicine visits
  • Secure participant communication
Features
Read full description

Join the eResearch community of clinical research volunteers to help end the addiction to cigarettes. eResearch is the first mobile clinical research platform that helps advance research in smoking cessation and harm reduction. Led by Dr. Jed Rose, co-inventor of the nicotine skin patch, Rose Research Center, LLC (RRC) enables at-home, remote participation in clinical research studies. By using eResearch you can participate in clinical trials which focus on researching nicotine addiction and smoking cessation. Today, the Surgeon General still lists cigarette smoking as the #1 leading preventable cause of death in the United States(1). At RRC we hope to make this statistic a thing of the past. Features Volunteer – We are seeking individuals, 21 years and older, that use nicotine containing products to volunteer by registering with the eResearch app. Simply provide your contact information and answer a few questions regarding your nicotine usage history. This information will help match you to current and future clinical studies. Participation – When matched with a study, eResearch allows you to enroll by providing your consent through our 100% online eConsent process. You can stop, or choose not to participate, at any time. Remember, your participation is always voluntary! Studies vary, and RRC offers new research studies all the time. As new studies launch, you can opt in for alerts to those in which you may be a good match. If I Participate, what does this app do? 1. Payments – Compensation is provided for study participation. eResearch utilizes an electronic payment gateway to pay you for your involvement. 2. Study Assessments – We may ask you to check in with us from time to time to see how you are feeling and progressing with the study. These assessments (also called remote visits) are scheduled in advance with our team of researchers. 3. Communication – Using eResearch, you can stay in touch with our study team. Our clinical research team will schedule appointments with participants throughout your participation in a study. Inside eResearch, Contact Us information includes phone numbers to reach study personnel and medical emergency phone numbers. 4. Telemedicine – Live telemedicine visits may be conducted through eResearch to engage with you just as if your study visit had been conducted in-person. Participants may meet with research or board-certified medical personnel, depending on the type of visit. Participant safety is our highest priority. Additionally, your volunteer information is kept confidential and is not shared with third parties. All research conducted by RRC is reviewed by an independent Institutional Review Board. Additionally, all studies are registered with clinicaltrials.gov and meet the requirements of Good Clinical Practice. (1) US Centers for Disease Control and Prevention. https://www.cdc.gov/tobacco/data_statistics/fact_sheets/fast_facts/index.htm

Screenshots

Study Scavenger4 screens
eResearch4 screens

Verdict

The call

The clearest difference is rating: eResearch at 4.6 against Study Scavenger's 1.8. eResearch also leads on review sentiment (90% vs 60%) and ratings volume (75 vs 11). Study Scavenger's advantage is monetization model (free vs free with in-app purchases) and iOS requirement (9.0 vs 15.1). 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

CostPrice · In-app purchases · Ads · Monetization

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

ReceptionRating · Positive reviews · Number of ratings

eResearch holds the better App Store score, 4.6 against 1.8. That said, the two scores are not equally well evidenced: eResearch has 75 ratings behind it against 11, so its average is the more settled of the two. Written reviews point the same way: 60% of Study Scavenger's written reviews are positive against 90% of eResearch's.

UpkeepUpdate frequency

Study Scavenger ships an update every 6 weeks, eResearch every 5 weeks. The most recent releases landed on October 11, 2026 and October 17, 2026 respectively.

Scorecard5 real differences · 5 level
Study Scavenger versus eResearch: the parameters behind the verdict, then further details
ParameterStudy ScavengereResearch
PriceFreeFree
Rating1.8 (11 ratings)4.6 (75 ratings) — better
Positive reviews60.0% of reviews89.7% of reviews — better
Number of ratings1175 — better
Update frequencyEvery 6 weeksEvery 5 weeks — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPodiPhone, iPod
Requires iOS9.0 — better15.1
Further details — not scored
Size3 MB136 MB
Age rating4+17+
DeveloperStudyScavengerRose Research Center,LLC

Customer experience

Study Scavenger

All ratings11 ratings
Positive18.2%
Neutral0.0%
Negative81.8%
Written reviews15 reviews
Positive60.0%
Neutral0.0%
Negative40.0%

eResearch

All ratings75 ratings
Positive92.0%
Neutral1.3%
Negative6.7%
Written reviews39 reviews
Positive89.7%
Neutral0.0%
Negative10.3%

Bugs and requests

Study Scavenger

Not enough reviews yet to summarise bugs or requests.

eResearch

Reported bugs

3 issues
  • Difficult to reset email
  • App notifications cannot be turned on outside the app
  • Surveys sometimes not sent

Requested features

1 request
  • Allow users to turn on app notifications outside the app

In-app purchases

None

Study Scavenger

No in-app purchases

None

eResearch

No in-app purchases

Questions

Is Study Scavenger free?
Study Scavenger is free to download, with no in-app purchases.
Is eResearch free?
eResearch is free to download, with no in-app purchases.
Which has better reviews, Study Scavenger or eResearch?
eResearch is rated higher. Study Scavenger averages 1.8 out of 5 from 11 ratings, while eResearch averages 4.6 from 75 ratings.
Do Study Scavenger or eResearch have ads?
Neither Study Scavenger nor eResearch shows ads.
Which is updated more often, Study Scavenger or eResearch?
Study Scavenger ships an update every 6 weeks, and eResearch every 5 weeks. Most recently, Study Scavenger was updated on October 11, 2026 and eResearch on October 17, 2026.

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