# Derin — Deep Work Timer — Stay Focused, Build Streaks

> Stay Focused, Build Streaks (iPhone/iPad app by Skander Blaiti.)

- Source: https://appshunter.io/ios/app/derin-deep-work-timer/id6805166820 (this page in markdown: same URL + `.md`)
- Developer: [Skander Blaiti](https://appshunter.io/developer/1723821983)
- Category: Productivity, Utilities
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 16.4 · 51 MB
- Languages: American English
- Released: 2026-09-27
- Data updated: 2026-10-26

## What is Derin?

Derin is a focus timer built for people who do real work — developers, writers, freelancers, and anyone who needs uninterrupted time to think.

Pick a session, start focusing, and see your progress live — right on your Lock Screen and Dynamic Island. No need to unlock your phone or check a tab. Just glance and keep going.

WHY DERIN?

— Live Dynamic Island & Lock Screen countdown
See your remaining time and progress ring without leaving what you're doing. No other focus timer makes this as seamless.

— Fixed focus lengths
Choose 25 or 50 minutes free, or unlock 90-minute sessions with Derin Pro. No decision fatigue, no custom timers to configure — just start.

— Streaks that matter
Complete one session a day to keep your streak alive. Simple to understand, satisfying to maintain.

— Session history
See today's session for free. Unlock unlimited history and weekly/monthly focus analytics with Derin Pro.

— Calm, distraction-free design
Dark by default, minimal, no gamification, no notifications begging you back. Derin gets out of your way.

Start your first session today.

Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Derin Pro Weekly | $3.99 | per 7 days |
| Derin Pro Monthly | $7.99 | per month |
| Derin Pro Yearly | $29.99 | per year |


## Is Derin safe?

Not enough ratings yet to assess Derin.

## Is Derin legit?

Derin — Deep Work Timer appears legitimate, with a few gaps. The AppsHunter Legitimacy Score for Derin is 65 out of 100 points across 7 verification signals from App Store and developer data.


## Version history (last 1 release)

### 1.0.0 — 2026-09-28

No release notes.

## More apps by Skander Blaiti

- [Faktur: Invoice Maker](https://appshunter.io/ios/app/faktur-invoice-maker/id6475290686)
- [Billyo — Subscription Tracker](https://appshunter.io/ios/app/billyo-subscription-tracker/id6776649922)
- [Borne de recharge Tunisie](https://appshunter.io/ios/app/borne-de-recharge-tunisie/id6790168916)

All apps by Skander Blaiti: https://appshunter.io/developer/1723821983

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-10-26.*