Doongsil vs Focus Aquarium
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Doongsil
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Make time for your goals with a little adventure. Our adorable friends dream of traveling to space in hot air balloons. What is your goal? Join them on a journey of your own. As you spend time focusing, your balloon rises higher toward space. - Customize your balloon, basket and character to make your goals your own. - Stay focused with a timer and watch your balloon rise. - Record your daily activities with notes and photos, and look back on your progress.
Focus Aquarium
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Turn your focus into a living aquarium. Built for students, professionals, and anyone with ADHD who needs a gentle nudge to stay off their phone and get into flow. While you focus, Otto the octopus collects pearls from the ocean floor - use them to unlock fish, grow your tank, and watch your underwater world evolve session by session. No pressure. No guilt. Just gentle progress. FEATURES Focus timer with real rewards - 15, 25, 45, or 60 minute sessions - Earn pearls while you focus - Watch your aquarium evolve over time Calm by design - Gentle, ADHD-friendly experience - No pressure or punishment - Designed to help you stay consistent Build your aquarium - Unlock fish and backgrounds - Customize your tank - Create your own underwater world Deep Focus Mode - Block distracting apps during sessions - Stay fully present and uninterrupted Simple focus stats - Track sessions, time, and streaks - Visualize your progress over time UNLOCK PREMIUM - Earn 3× more pearls - Unlock corals for premium fish & rewards - Customize app blocking (block lists) - Unlock a larger tank for more fish - Access full stats history Available as monthly, yearly, or lifetime. PRIVACY FIRST Focus Aquarium does not collect or sell your personal data. Everything stays on your device. Start small. Stay consistent. And watch your aquarium come to life. Privacy Policy: https://focusaquarium.carrd.co/ Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is ads: Focus Aquarium at none against Doongsil's shown. Focus Aquarium also leads on update cadence (fortnightly vs every 11 months). Doongsil's advantage is iOS requirement (15.0 vs 18.6). On price, 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. Doongsil sells 1 one-off in-app purchase and Focus Aquarium sells 3 in-app purchases, starting at $3.99 per month. Whichever you choose, the download price is not the number that matters.
Doongsil ships an update every 11 months, Focus Aquarium fortnightly. The most recent releases landed on October 30, 2026 and October 31, 2026 respectively.
| Parameter | Doongsil | Focus Aquarium |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 11 months | Fortnightly — better |
| Ads | Yes | No — better |
| In-app purchases | Yes | Yes |
| Devices | iPhone, iPod — better | iPhone |
| Requires iOS | 15.0 — better | 18.6 |
| Further details — not scored | ||
| Size | 42 MB | 45 MB |
| Age rating | 4+ | 4+ |
| Developer | Minseok Song | ERIK MICHAEL HAFTEL |
In-app purchases
Doongsil
- Doongsil Pro$3.99
Focus Aquarium
- Premium (Monthly)$3.991 Month
- Premium (Yearly)$29.991 Year
- Premium (Lifetime)$59.99
