Comparison

Hundred Day Challenge vs 3DaysDo

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

Head to head
About

Hundred Day Challenge

This app helps you build lasting habits and achieve goals through consistent, small daily actions over 100 days. Track multiple challenges simultaneously, visualize your progress, and stay motivated with visual cues and milestone rewards.

Highlights
  • Multiple challenges at once
  • Daily completion tracking
  • Progress visualization
  • Motivating main screen
  • Icon selection per challenge
  • Progress rewards
Features
Read full description

What is the 100 Day Challenge? The 100 Day Challenge helps you work consistently toward your goals and build real habits. Instead of big leaps, it's about small, daily steps that add up over 100 days and bring lasting change. Key features: • Multiple challenges at once: Start and manage different 100-day challenges in parallel (e.g., reading, sports, learning, meditation). • Daily completion: Mark your progress with just one tap – “Today done” keeps your streak alive. • Visualization: See your progress at a glance: expanded view with 100 days, checked days in green with check marks. • Motivating main screen: Personal greeting, overview of all active challenges, progress indicators, and quick selection. • Icon selection per challenge: Choose a suitable icon for each challenge. • Progress rewards: Visualize milestones and stay in the flow. • Pro version (in-app purchase): Unlock all features, remove restrictions, and get additional personalization options. Why does it work? Because small, daily actions done consistently are more effective than sporadic motivation. 100 days is short enough to stick with and long enough to form real habits. Social accountability – use it to your advantage: Share the start of your challenge on social media or with friends. Post at the beginning and after important milestones – this creates gentle social pressure that motivates you to stick with it. Others know that you have started, and you don't want to break the streak. Privacy & Sync: All data is private and stored securely in your iCloud account. There are no central servers; your challenge data belongs only to you. Tips for maximum impact: • Choose clear, specific tasks (e.g., “read for 10 minutes” instead of “read more”). • Use multiple parallel challenges, but don't overload yourself – focus helps. • Check your streak regularly to avoid setbacks and maintain motivation. Upgrade to the full version: Unlock the full power: unlimited challenges and no restrictions on the number of days. Support & feedback: Do you have any ideas or need help? Write to us directly via the app or visit our support page (link in the app). Your feedback makes the challenge better.

About

3DaysDo

Read full description

All I needed was a simple checklist before leaving home — keys, wallet, badge, umbrella. 30 seconds, then out the door. But the tools I found were designed for more complex scenarios. Project planning, team coordination, weekly reviews. Great tools for serious work, just not what I was looking for. I didn't need a system. I needed a list I could reuse every morning with one tap. There was another thing that bothered me. Tasks I'd added days ago would still be sitting there, unfinished, waiting. Some no longer mattered. But seeing them every time I opened the app gave me a feeling I couldn't quite shake. That quiet anxiety eventually made me stop opening it altogether. So I built 3DaysDo for myself — and for anyone who just wants something simple. No recurring setup. No analytics. No due dates. Add today's tasks. Tap a saved checklist to load it instantly. Check things off. 30 seconds. Done. If something isn't finished by tomorrow, you get a gentle reminder once. After 3 days, it quietly disappears on its own. No piling up. No guilt. Open the app tomorrow and it's a clean slate. Just today. Just what's in front of you. Features: • Today-only workflow — see only what matters now • 3-day auto decay — old tasks quietly disappear, keeping your list clean • Smart reminders — unfinished tasks get a gentle nudge the next day, just once • Reusable task bundles — save a checklist, load it in one tap, ready in 30 seconds • Carry-over triage — handle yesterday's leftovers simply, no piling up • Color labels — quick visual sorting, zero complexity • Home screen widget — check and complete tasks without opening the app • Daily reminders — build your planning habit • Subtask support — break bigger tasks into actionable steps • Multiple themes — make it yours • Local-only data — nothing leaves your device, your privacy matters 3Days Pro (unlock all premium features): • All premium themes • Unlimited task bundles • Extended subtask capacity • Advanced smart reminders — smarter reminder timing • Widget quick actions — complete tasks right from your home screen 3DaysDo — 30 seconds to set up. Then go live your day.

Screenshots

Hundred Day Challenge4 screens
3DaysDo4 screens

Verdict

The call

The clearest difference is update cadence: 3DaysDo at every 3 weeks against Hundred Day Challenge's every 9 months. On price, ads, in-app purchases and device support 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. Hundred Day Challenge sells 1 one-off in-app purchase and 3DaysDo sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Hundred Day Challenge ships an update every 9 months, 3DaysDo every 3 weeks. Both last shipped on November 5, 2026.

Scorecard1 real difference · 8 level
Hundred Day Challenge versus 3DaysDo: the parameters behind the verdict, then further details
ParameterHundred Day Challenge3DaysDo
PriceFreeFree
Rating4.7 (3 ratings) — better—
Number of ratings3 — better—
Update frequencyEvery 9 monthsEvery 3 weeks — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchases—
DevicesiPhone, iPad — betteriPhone
Requires iOS18.517.0 — better
Further details — not scored
Size2 MB6 MB
Age rating4+4+
DeveloperUrs Jaeggi洪英 裴

In-app purchases

1 purchases

Hundred Day Challenge

One-time1
  • Full Version$0.99
1 purchases

3DaysDo

One-time1
  • 3Days Pro$1.99

Questions

Is Hundred Day Challenge free?
Hundred Day Challenge is free to download, with in-app purchases available.
Is 3DaysDo free?
3DaysDo is free to download, with in-app purchases available.
Do Hundred Day Challenge or 3DaysDo have ads?
Neither Hundred Day Challenge nor 3DaysDo shows ads.
Which is updated more often, Hundred Day Challenge or 3DaysDo?
Hundred Day Challenge ships an update every 9 months, and 3DaysDo every 3 weeks. Most recently, Hundred Day Challenge was updated on November 5, 2026 and 3DaysDo on November 5, 2026.

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