Du Contracts vs Habit Stacker App
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Du Contracts
This app helps you build self-trust by creating time-bound "I Will" or "I Won't" commitments. Unfulfilled contracts are visible for a week, serving as a reminder to follow through on your promises to yourself.
- Create "I Will" or "I Won't" contracts
- 24-hour contract expiration
- Automatic failure tracking
- Visible failure reminders
- Build self-trust and accountability
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The relationship you have with yourself is the most important one you’ll ever build. When you promise yourself you’ll call your doctor, do the dishes, or hit the gym—you owe it to yourself to follow through. At your core, you are two people constantly interacting with one another: the one who decides, and the one who acts. That’s Du! — the dialogue between you and yourself. Introducing Du Contracts. This app lets you create simple “I Will” or “I Won’t” contracts with a 24-hour expiration. Within that window, you either complete or fail your contract. If you don’t update it in time, it automatically moves to your Failure Folder. Failures stay visible on your home page for at least seven days—a gentle but firm reminder of your unfinished commitments. Hold yourself accountable. Build trust with yourself. Start your first Du Contract today.
Habit Stacker App
This app helps you build new routines by linking them to existing daily habits. Track your progress and watch your streaks grow as you consistently achieve your goals.
- Habit stacking technique
- Streak tracking
- Habit leveling system
- Custom habit addition
- Daily routine integration
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What is habit stacking? Habit stacking is a proven productivity technique that pairs a new, desired behavior with an existing, automatic daily routine. By using an established habit as a natural trigger, you bypass the need for relying on willpower, making it significantly easier to build consistent routines. After I pour my morning coffee, I will write down my top priority for the day. The coffee is the trigger; the new habit stacks right on top. How the app works? 1. Add a habit and the date you started it. 2. Keep your streak — the app tracks how many days you've kept each habit. 3. Watch habits level up as streaks pass 1, 21, and 365 days.
Screenshots
Verdict
The clearest difference is iOS requirement: Du Contracts at 13.0 against Habit Stacker App's 15.6. On price, rating, ratings volume and update cadence 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.
On the App Store both sit at effectively the same score — 5.0 for Du Contracts against 5.0 for Habit Stacker App. Both are backed by a comparable volume of ratings — 2 and 1 respectively.
Du Contracts ships an update every 3 days, Habit Stacker App every 2 days. The most recent releases landed on September 16, 2026 and August 27, 2026 respectively.
| Parameter | Du Contracts | Habit Stacker App |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (2 ratings) | 5.0 (1 ratings) |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | 2 — better | 1 |
| Update frequency | Every 3 days | Every 2 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 13.0 — better | 15.6 |
| Further details — not scored | ||
| Size | 19 MB | 4 MB |
| Age rating | 4+ | 4+ |
| Developer | Dylan Kramer | John Picasso |
Customer experience
Du Contracts
Habit Stacker App
In-app purchases
Du Contracts
No in-app purchases
Habit Stacker App
No in-app purchases





