QuackGoals vs DevilBrain
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
QuackGoals
This app encourages a balanced approach to productivity by allowing users to earn leisure time through focused work or study. It promotes guilt-free relaxation by ensuring downtime is earned, with automatic reminders to prevent overuse.
- Earn leisure time through focused work
- Redeem time for social media, gaming, videos
- Automatic leisure time reminders
- Guilt-free relaxation philosophy
- Planned relaxation for sustainable diligence
Read full descriptionHide full description
Why hustle? Every second you spend on short videos is earned through your hard work! Hey, welcome to Self-Discipline Duck, Get your exclusive "chill permit" for students and workers! Our new philosophy: "Planned relaxation brings sustainable diligence". We reject the rat race, and we advocate: • Work with purpose, relax with boundaries • Stay productive to enjoy your downtime You can relax without guilt, because you’ve put in genuine effort! 【The Popular Time Exchange Rule of Self-Discipline Duck】 Focus on study or work for minutes to earn your leisure time. Redeem 1:1 for scrolling social media, gaming and watching videos. Auto reminder when leisure time ends, no overuse! This update lets you relax freely and confidently~ [Contact & Feedback] Online Support: Self-Discipline Duck → Me → Online Customer Service Email: wayxtech@163.com
DevilBrain
This app offers cognitive conditioning and brain sharpening exercises to improve focus and memory. It provides personalized training plans and assessments to help users enhance their mental capabilities and combat phone addiction.
- Brain Age Assessment
- Customized Training Plans
- Digital Memory Challenges
- Schulte Focus Training
- Personal Adaptive Training
- Cognitive Conditioning
Read full descriptionHide full description
Break Free From Phone Addiction — Activate Your Brain, Elevate Focus and Solidify Memory This professional train app focuses on cognitive conditioning, brain sharpening and memory enhancement. It delivers targeted brain puzzle and brain test sessions to empower your mind. Break free from endless short-video scrolling, take full control of your impulse response, build steady mindfulness, and gain lifelong capability to avoid memory decline and social elimination. Core Tags: cognitive training, brain workout, memory improvement, mental development, brain sharpening, focus cultivation, reaction conditioning, logic thinking, logic puzzles, relaxing mental practice, memory for adults Core Functions 1. Brain Age Assessment Finish 5 benchmark mental tests including digit memory, impulse reaction, color discernment, Schulte Grid and fast calculation. Obtain your exclusive brain age report and percentile ranking instantly. 2. Customized Train Plan Fit scientific brain stimulation into fragmented downtime: waiting in line, commuting or lunch breaks. This train app auto-matches 1-3 minute exclusive training sessions. 3. Digital Memory Challenge Start classic sequential digit drills from 4-digit level, upgrade levels for correct answers and review flaws immediately after mistakes. 4. Schulte Focus Training Adopt original dual-mode brain puzzle design: complete sequential 1-25 Schulte selection plus instant mental logic calculation to activate dual brain hemispheres simultaneously. 5. Personal Adaptive Training The system adjusts daily training content dynamically via 20+ professional indicators, including personal best/average scores, color perception and impulse test data. Scenarios for All Users • Students: Calm pre-exam anxiety, activate brain status for better performance • Interviewees: Stabilize mindfulness, heighten on-site focus during interviews • Esports Players: Optimize impulse reaction to outperform rivals instantly • Seniors: Rejuvenate brain age, maintain independent cognition and memory • Working Moms: Restore sharp mind efficiently, adapt to workplace comeback quickly • Daily Users: Build self-discipline, enjoy soothing relaxing mental practice away from phone addiction Why Choose Us 1. Scientifically verified brain training framework, combining targeted brain test and brain puzzle sessions to elevate cognitive limits professionally. 2. Improve inner strength quietly via persistent mind polishing, enhance self-competitiveness steadily. 3. Deliver visible mental upgrades: better logic, stronger memory and controlled impulse with long-term training. Take a 3-minute mental challenge right now, and witness your cognition shift from tentative improvement to comprehensive upgrade. Devoted Brain Training — Every tap ignites new neural growth for your brain and mind. - Privacy Policy:https://privacy.minecaller.com/brain/privacy_en_ios.html - EULA:https://privacy.minecaller.com/brain/EULA_en_ios.html - VIP Agreement:https://privacy.minecaller.com/brain/vip_service_en_ios.html
Screenshots
Verdict
The clearest difference is update cadence: DevilBrain at every 9 days against QuackGoals's every 6 weeks. DevilBrain also leads on review sentiment (62% vs 50%) and iOS requirement (15.1 vs 17.0). 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
Both are free to download. QuackGoals sells 3 one-off in-app purchases and DevilBrain sells 7 in-app purchases, starting at $3.99 per 7 days. Whichever you choose, the download price is not the number that matters.
QuackGoals ships an update every 6 weeks, DevilBrain every 9 days. The most recent releases landed on October 2, 2026 and October 8, 2026 respectively.
| Parameter | QuackGoals | DevilBrain |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | — |
| Positive reviews | 50.0% of reviews | 61.5% of reviews — better |
| Number of ratings | 1 — better | — |
| Update frequency | Every 6 weeks | Every 9 days — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Devices | iPhone | iPhone, iPod — better |
| Requires iOS | 17.0 | 15.1 — better |
| Further details — not scored | ||
| Size | 54 MB | 70 MB |
| Age rating | 12+ | 4+ |
| Developer | 杭州未智科技有限公司 | 青青 吴 |
Customer experience
QuackGoals
DevilBrain
In-app purchases
QuackGoals
- 300鸭力$0.99
- 600鸭力$1.99
- 1200鸭力$2.99
DevilBrain
- Weekly7 Days trial$3.997 Days
- Monthly$4.991 Month
- Monthly3 Days trial$4.991 Month
Show 2 moreShow fewer
- Monthly1 Month trial$6.991 Month
- Yearly$12.991 Year
- 3 Years$39.99
- Permanent VIP$39.99









