Comparison

Recollect the Study vs KF

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

Head to head
About

Recollect the Study

Engage in a side-scrolling platformer designed to enhance working memory and cognitive skills. Explore diverse worlds, collect resources in specific sequences, and overcome obstacles using memory-based gameplay. This scientifically backed game aims to improve attention and brain plasticity.

Highlights
  • Working memory training
  • Cognitive challenges
  • Side-scrolling platformer gameplay
  • Resource collection with sequences
  • Brain plasticity improvement
  • Reward-based framework
Features
Read full description

This is the Study Release of Recollect, for scientific research. Recollect is a working memory training game produced by the University of California Riverside (UCR) Brain Game Center for Mental Fitness and Well-being; A research unit focused on brain fitness methods and applications. Recollect is our third installment of memory training games, and is highly premised upon empirical data derived from its predecessors. Recollect maintains the effective framework of previous installments, but takes a leap forward by incorporating additional cognitive challenges and features intended to generalize the effectiveness of the program into a side-scrolling platformer. Recollect has been designed for all age groups interested in fun and effective brain-training. Based on over a decade of cognitive and neuroscience research, Recollect incorporates scientifically supported renditions of N-Back, Item Span, and Multiple-Identity tracking tasks. These tasks are independently shown to improve working memory in a manner that transfers to untrained tasks. Recollect is the product of a multi-faceted research project to answer questions related to working memory improvement, brain plasticity, and issues surrounding attention and reinforcement within cognitive training programs. Players are immersed into a game environment where they must perform and improve upon different cognitive tasks in order to advance to new realms and unlock advanced features. Our cognitive tasks are coupled together in a reward based framework that reinforces user adherence to the program and maintain training efficacy. The premise of the game is set in a multi-world universe where the player is an astronaut (Lerner) tasked with collecting resources for the last human space colony. The player must explore planets in order to gather the necessary plants and minerals needed to feed the colony and keep their technology working. Players will experience that the required resources and planets are tricky, as resources must be collected in specific sequences to prevent them from quickly deteriorating, and planets are riddled with hazardous materials and obstacles. The mission is to help Lerner navigate the perilous terrain by using her memory skills to safely gather the resources. The fate of the human race rests on your shoulders!

About

KF

This app helps you identify and express your personal strengths by focusing on 24 character strengths. It provides a daily journal to "spot" these strengths, offering reminders and monthly summaries to boost mood and well-being.

Highlights
  • Strength identification
  • Daily strength spotting journal
  • Reminders to spot strengths
  • Monthly strength summaries
  • Focus on 24 character strengths
  • Boosts mood and well-being
Read full description

STRIDE stands for “Strength Identification and Expression,” which means becoming aware of your personal strengths and using them more in your daily life. The KF-STRIDE® app was developed by Kessler Foundation to help individuals learn how to do “strength-spotting,” which is a way of recognizing when you use your strengths every day! The app focuses on 24 character strengths, which are positive traits identified by the field of positive psychology. The app provides a description of these strengths, as well as a place to “spot” them in a daily journal. Research shows that “spotting” strengths has clinical benefit: it can boost your mood and well-being and show you how many times you do something “right,” as opposed to focusing on what you do “wrong.” In addition to the daily journal, the KF-STRIDE® app will provide you with reminders to spot your strengths and a monthly summary of all the strengths you used that month. KF-STRIDE® was created by Kessler Foundation with support from Alfiero and Lucia Palestroni Foundation.

Screenshots

Recollect the Study4 screens
KF3 screens

Verdict

The call

The clearest difference is rating: KF at 5.0 against Recollect the Study's 4.1. Recollect the Study's advantage is update cadence (monthly vs every 8 months) and ratings volume (15 vs 2). On price, ads, in-app purchases and monetization model 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

KF holds the better App Store score, 5.0 against 4.1. That said, the two scores are not equally well evidenced: Recollect the Study has 15 ratings behind it against 2, so its average is the more settled of the two.

UpkeepUpdate frequency

Recollect the Study ships an update monthly, KF every 8 months. Both last shipped on October 24, 2026.

Scorecard3 real differences · 7 level
Recollect the Study versus KF: the parameters behind the verdict, then further details
ParameterRecollect the StudyKF
PriceFreeFree
Rating4.1 (15 ratings)5.0 (2 ratings) — better
Positive reviews0.0% of reviews—
Number of ratings15 — better2
Update frequencyMonthly — betterEvery 8 months
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS11.0 — better12.4
Further details — not scored
Size699 MB14 MB
Age rating4+12+
DeveloperUniversity of California RiversideKessler Foundation

Customer experience

Recollect the Study

All ratings15 ratings
Positive66.7%
Neutral20.0%
Negative13.3%
Written reviews1 reviews
Positive0.0%
Neutral100.0%
Negative0.0%

KF

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Recollect the Study

No in-app purchases

None

KF

No in-app purchases

Questions

Is Recollect the Study free?
Recollect the Study is free to download, with no in-app purchases.
Is KF free?
KF is free to download, with no in-app purchases.
Which has better reviews, Recollect the Study or KF?
KF is rated higher. Recollect the Study averages 4.1 out of 5 from 15 ratings, while KF averages 5.0 from 2 ratings.
Do Recollect the Study or KF have ads?
Neither Recollect the Study nor KF shows ads.
Which is updated more often, Recollect the Study or KF?
Recollect the Study ships an update monthly, and KF every 8 months. Most recently, Recollect the Study was updated on October 24, 2026 and KF on October 24, 2026.

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