# SumDU vs Focus Lock

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.

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.

## The numbers

| Metric | SumDU | Focus Lock |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/sumdu/id698235283/reviews) | [5.0 (2 ratings)](https://appshunter.io/ios/app/focus-lock-pomodoro-timer/id6612030211/reviews) |
| Number of ratings | 1 | **2** |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 8 months | **Every 9 days** |
| Monetization | **Free** | Freemium |
| Size | 14 MB | 34 MB |
| Requires iOS | **12.1** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [App Dev Academy Ltd.](https://appshunter.io/developer/1281918813) | [SleepyBytes SIA](https://appshunter.io/developer/537208079) |

## What reviewers say

### SumDU

[App page](https://appshunter.io/ios/app/sumdu/id698235283)

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.

**Highlights:** University schedule access, Professor and auditorium schedules, Offline schedule download, Calendar integration, Schedule for all groups

**In-app purchases:** none


### Focus Lock

[App page](https://appshunter.io/ios/app/focus-lock-pomodoro-timer/id6612030211)

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.

**Highlights:** 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

**Features:** macOS Compatibility, Family Sharing, Vision Pro support

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Focus Pro | $1.99 | per 7 days |
| Focus Pro | $4.99 | per month |
| Focus Pro | $19.99 | per year |
| Yearly Plan | $19.99 | per year |
| Focus Pro | $17.99 | one-time |


## Frequently asked questions

### Is SumDU free?

SumDU is free to download, with no in-app purchases.

### Is Focus Lock free?

Focus Lock is free to download, with in-app purchases available.

### Which has better reviews, SumDU or Focus Lock?

SumDU and Focus Lock are both rated 5.0 out of 5 on the App Store, from 1 and 2 ratings respectively.

### Do SumDU or Focus Lock have ads?

Neither SumDU nor Focus Lock shows ads.

### Which is updated more often, SumDU or Focus Lock?

SumDU ships an update every 8 months, and Focus Lock every 9 days. Most recently, SumDU was updated on June 7, 2026 and Focus Lock on August 19, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*