SumDU vs Focus Lock
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
SumDU
Access your university schedule, including classes, professors, and rooms, all in one convenient app. Download your schedule for offline use and sync it with your device's calendar to avoid missing appointments.
- University schedule access
- Professor and auditorium schedules
- Offline schedule download
- Calendar integration
- Schedule for all groups
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Are you working or studying at Sumy State University? This app will be your saviour! Schedule for all professors, groups and auditoriums in one place. Download schedule for all groups, professors and auditoriums you need and use it offline. Add schedule directly to Calendar app and don't be late for your class!
Focus Lock
This app helps you stay focused by automatically blocking distracting applications during designated work or study sessions. It's designed to eliminate willpower reliance, ensuring your chosen apps remain inaccessible until your session concludes. Track your progress and celebrate your focus achievements.
- Automatic app blocking during sessions
- Customizable focus session durations
- Streak system for consistency
- Badge progression for motivation
- Session celebrations and rewards
- Daily and weekly focus statistics
- iCloud sync across devices
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You've tried the Pomodoro apps. They tell you to focus for 25 minutes while TikTok is one tap away. That's not a timer problem. That's a phone problem. Focus Lock is different. When you start a session, distracting apps get LOCKED OUT. Instagram, TikTok, Twitter—whatever hijacks your attention. Blocked until you're done. No willpower required. Just locked. LOCK IN WITH ONE TAP • Start a Pomodoro session instantly • Distracting apps are automatically blocked • Apps unlock when your session ends • No more "just checking" spirals Built by someone with ADHD who was tired of losing hours to the phone. HOW IT WORKS 1. Pick the apps that steal your focus (you know which ones) 2. Tap to start a focus session 3. Those apps are LOCKED until you're done 4. Complete your session. Apps unlock. You win. That's it. Lock in. Block out. Focus. BUILT FOR ADHD BRAINS • Flexible Durations - 25 or 45 minute presets, or go premium for 5-120 minutes. Hyperfocus needs 90 minutes? Scattered day needs 15? We don't judge. • Smart Tags - 8 built-in categories to track where focus goes. Premium users can create custom tags. • Streak System - Stay locked in day after day. Build consistency. Miss a day? No shame. Just lock back in. • Badge Progression - Novice to Bronze to Silver to Gold to Diamond. Real milestones for staying locked in. CELEBRATE WINS ADHD brains need dopamine. Focus Lock delivers: • Session celebrations when you complete a focus block • Streak rewards for consistency • Share your wins on social media • Badge unlocks as you progress TRACK YOUR PATTERNS • Today View - See daily focus time at a glance • Weekly Stats - Discover your patterns. Best days? Top categories? • iCloud Sync - Data follows you across Apple devices PREMIUM FEATURES Upgrade to unlock: • Custom durations (5-120 minutes) • Create your own tags • Hide built-in tags • Block unlimited apps • Support indie development Privacy Policy: http://sleepybytes.com/privacy-policy/ Terms of use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is in-app purchases: SumDU at none against Focus Lock's 5. SumDU also leads on device support (3 vs 1) and iOS requirement (12.1 vs 18.0). Focus Lock's advantage is update cadence (every 9 days vs every 8 months). On price, rating, review sentiment and ratings volume 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. Focus Lock sells 5 in-app purchases, starting at $1.99 per 7 days. SumDU asks for nothing beyond the download.
On the App Store both sit at effectively the same score — 5.0 for SumDU against 5.0 for Focus Lock. Both are backed by a comparable volume of ratings — 1 and 2 respectively. Written reviews split almost evenly too, at 100% and 100% positive.
SumDU ships an update every 8 months, Focus Lock every 9 days. The most recent releases landed on June 7, 2026 and August 19, 2026 respectively.
| Parameter | SumDU | Focus Lock |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) | 5.0 (2 ratings) |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| Number of ratings | 1 | 2 — better |
| Update frequency | Every 8 months | Every 9 days — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Freemium |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 12.1 — better | 18.0 |
| Further details — not scored | ||
| Size | 14 MB | 34 MB |
| Age rating | 4+ | 4+ |
| Developer | App Dev Academy Ltd. | SleepyBytes SIA |
Customer experience
SumDU
Focus Lock
In-app purchases
SumDU
No in-app purchases
Focus Lock
- Focus Pro$1.997 Days
- Focus Pro$4.991 Month
- Focus Pro3 Days trial$19.991 Year
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- Yearly Plan1 Month trial$19.991 Year
- Focus Pro$17.99
