Demon Time vs Deep Hours
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Demon Time
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Every hour you grind feeds your demon. Demon Time is a focus timer that transforms your practice hours into a dark, addictive progression system. Track time on any skill or project, watch your demon evolve through 8 ranks — from a tiny Ember to a fearsome Demon Lord — and maintain your Possession Chain to prove you're built different. Inspired by the 10,000 hour rule, Demon Time makes the long grind feel rewarding from day one. Each session is a Ritual. Each project is a Demon you're raising. Skip a day and your demon starts rusting. Neglect it for a month and it begins to starve. But show up consistently? Your demon evolves, your rank ascends, and you earn Souls to customize your experience. SUMMONING CIRCLE TIMER Start The Ritual and watch the summoning circle track your session with rotating runes, glowing progress arcs, and floating ember particles. This isn't a boring countdown — it's a ceremony. 8 DEMON RANKS Evolve from Ember (0h) to Demon Lord (10,000h). Each rank transforms your demon's visual form — growing horns, wings, orbiting runes, and reality-warping effects as you ascend. LIVING DEMON MASCOTS Your demon lives inside the summoning circle. It thrives when you grind, dims when you slack, rusts when you disappear, and starves if you abandon it. Feed it or watch it die. POSSESSION CHAINS Maintain your streak by logging at least one session every day. Watch your chain grow from Sparked (3 days) to Immortal (365 days). Break it and feel the pain. SCROLLS (INSIGHTS) Discover when you're most productive, which sessions hit flow state, and how your hours compare week over week. Data presented as ancient wisdom from the underworld. RELICS (ACHIEVEMENTS) Unlock 30+ achievements — from First Blood (1 hour) to Dawn Breaker (session that starts before midnight and ends after 5am). Each relic earns Souls. SOUL ECONOMY Earn Souls through grinding and spend them on cosmetic upgrades — summoning circle skins, timer animations, ambient soundscapes, and profile flair. TRUE DEMON TIME Sessions between 12am and 5am earn bonus Souls and a special visual mode. The app knows when you're on demon time. Built for developers, musicians, artists, writers, students, and anyone tracking their 10,000-hour journey. Dark mode only. No ads in the free tier. Your grind deserves better than a pastel timer. Feed your demons. Keywords : focus,timer,productivity,hours,tracker,10000,pomodoro,streak,grind,study,practice,skill,habit,dark
Deep Hours
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Deep Hours 是一个为长期主义设计的时间记录与习惯追踪 App。你可以为阅读、健身、冥想等真正重要的事情或者刷短视频等你想摈弃的坏习惯建立项目,记录每一次投入的时间或次数,查看今日、本周和长期累计进度。 Deep Hours 相信一万小时理论。真正重要的成长不是一瞬间发生的,而是在一次次专注投入中慢慢积累。每一分钟都在复利。同样的,坏习惯的积累也非一日之寒 主要功能: - 为不同目标创建项目 - 支持时间记录与次数记录 - 支持每日打卡 - 查看今日、本周和项目累计统计 - 导出本地数据 - 删除本地数据 - 本地优先,当前版本的数据默认保存在本机 适合: - 想养成长期好习惯或者摈弃坏习惯的人 - 想记录阅读、运动、冥想或练习时间的人 - 想减少无意识消耗,把注意力投给重要事情的人 - 想看到长期积累进度的人 Deep Hours 帮你把分散的努力,沉淀成看得见的进步。 另外,私心推荐《掌控习惯》这本书。
Screenshots
Verdict
The clearest difference is device support: Demon Time at 4 against Deep Hours's 1. On price, ads, in-app purchases and iOS requirement 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. Neither carries in-app purchases, so what you see is what you pay.
| Parameter | Demon Time | Deep Hours |
|---|---|---|
| Price | Free | Free |
| Update frequency | — | Daily |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad, Apple Watch, Vision Pro — better | iPhone |
| Requires iOS | 17.6 | 17.0 — better |
| Further details — not scored | ||
| Size | 18 MB | 4 MB |
| Age rating | 17+ | 4+ |
| Developer | Sahil Chaddha | 玮琳 张 |
In-app purchases
Demon Time
No in-app purchases
Deep Hours
No in-app purchases









