Comparison

Demon Time vs 10,000 Hours

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Demon Time

Features
Read full description

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

About

10,000 Hours

This app helps you track your progress towards mastering any skill by logging practice sessions. It provides detailed insights into your activity patterns and helps you stay motivated to achieve your long-term goals.

Highlights
  • Log practice sessions with a built-in timer
  • Track progress towards custom hour goals
  • Analyze activity patterns and trends
  • Set weekly and monthly practice goals
  • View estimated completion dates
  • Home screen widgets for quick glances
  • Offline functionality
Features
Read full description

10,000 Hours - Mastery Tracker is a practice tracker for people serious about getting better at something — whether that's playing guitar, learning a language, writing fiction, coding, drawing, chess, or any skill that rewards sustained effort. The premise is straightforward. Pick what you want to improve at, decide how many hours you want to invest, and log your practice sessions as you go. Over weeks and months, you'll see your time accumulate, your patterns emerge, and your progress build. This isn't a habit tracker or a to-do list. It's a focused tool for one thing: helping you keep showing up for the work that matters to you, and giving you a clear picture of what you've done. WHO IT'S FOR This app is for anyone working toward a long-term goal, including: • Language learners tracking study, immersion, and conversation practice • Artists and writers building a consistent creative practice • Students preparing for exams, certifications, or daily study habits • Developers, designers, and other professionals leveling up specific skills • Career changers building new expertise for a transition or promotion • Researchers, academics, and serious readers tracking deep work hours • Athletes and fitness enthusiasts counting training hours toward goals • Competitive players in chess, esports, or other strategy games • Performers — actors, dancers, comedians, public speakers — refining their craft • Musicians logging practice toward auditions, recitals, or personal mastery • Hobbyists going deep on photography, woodworking, cooking, or any craft • Anyone returning to a skill after a break and wanting to rebuild consistency TRACK YOUR SKILLS • Add new skills as you need, each with a custom name, icon, color, and description • Set targets at common milestones (100, 1,000, or 10,000 hours) or any number you choose • Add optional weekly and monthly goals • See an estimated completion date based on your current pace • Organize with priority levels, tags, and per-skill settings RUN SESSIONS • Start the built-in timer when you sit down to practice • Pause and resume as needed • Add quick notes mid-session to capture thoughts AFTER EACH SESSION • Rate how focused you felt • Add notes on what you worked on • See your progress update in real time • Continue with the same skill, switch to another, or stop UNDERSTAND YOUR PATTERNS • Activity heatmap covering the last 12 months • Daily, weekly, and monthly breakdowns • Per-skill trends, totals, and averages • Best time of day and most productive weekday • Focus quality distribution • Current streak and upcoming milestones HOME SCREEN WIDGETS • Multiple sizes for quick glances • Show today's total, current streak, or all your skills at once ADDITIONAL SETTINGS • Light and dark appearance • Optional daily reminders and streak alerts • Language selection • Data export (Pro) WORKS OFFLINE The app does not require an account, sign-in, or internet connection. Your practice data lives on your device. No cloud account, no profile, no social feed. Daily reminders and language preferences are available if you want them. You can also export/import your data to a JSON file for backup/restore purposes.

Screenshots

Demon Time4 screens
10,000 Hours4 screens

Verdict

The call

The clearest difference is in-app purchases: Demon Time at none against 10,000 Hours's 1. Demon Time also leads on ads (none vs shown) and device support (4 vs 2). On price 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. 10,000 Hours sells 1 one-off in-app purchase. Demon Time asks for nothing beyond the download.

Scorecard3 real differences · 7 level
Demon Time versus 10,000 Hours: the parameters behind the verdict, then further details
ParameterDemon Time10,000 Hours
PriceFreeFree
Rating—4.7 (3 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings—3 — better
Update frequency—Every 5 months
AdsNo — betterYes
In-app purchasesNo — betterYes
Monetization—Free with in-app purchases
DevicesiPhone, iPad, Apple Watch, Vision Pro — betteriPhone, iPad
Requires iOS17.616.4 — better
Further details — not scored
Size18 MB56 MB
Age rating17+12+
DeveloperSahil ChaddhaThieu Khue

In-app purchases

None

Demon Time

No in-app purchases

1 purchases

10,000 Hours

One-time1
  • Time Tracker Pro$9.99

Questions

Is Demon Time free?
Demon Time is free to download, with no in-app purchases.
Is 10,000 Hours free?
10,000 Hours is free to download, with in-app purchases available.
Do Demon Time or 10,000 Hours have ads?
10,000 Hours shows ads; Demon Time does not.

Other comparisons