Du Contracts vs Stack'd
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.
Stack'd
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Stack'd makes building habits simple. Track your daily habits, build streaks, and journal your progress - all in one clean, focused app. Whether you're starting a morning routine, hitting the gym regularly, or building any positive habit, Stack'd keeps you accountable with daily check-ins, streak tracking, and journaling to document your journey. HOW IT WORKS - Create a habit and set your frequency (daily, weekly, specific days, or a custom schedule) - Check in each day to build your streak - Add rich text notes to journal your thoughts, motivation, or progress - View your history on a monthly calendar to see your consistency - Get gentle reminders so you never miss a day KEY FEATURES - Streak Tracking: Watch your streak grow day by day. Your longest streak is saved so you always know your personal best. - Flexible Scheduling: Daily, every other day, specific days of the week, or a custom number of days per week. - Rich Text Notes: Add formatted notes with bold, italic, lists, and more. Each day gets its own note, creating a personal habit journal. - Monthly Calendar View: See your check-in history at a glance with a colour-coded calendar. - Smart Reminders: Set custom reminder times for each habit so you stay on track. - Dark Mode: Easy on the eyes, day or night. - Privacy First: Your data is securely stored and never sold. PREMIUM (Optional) Free users can track up to 3 habits. Upgrade to Stack'd Premium for unlimited habits and support an independent developer. Stack'd is built by a solo founder who believes small daily positive actions lead to big changes. Start stacking your habits today. Terms of Use: https://www.notion.so/Terms-of-Use-End-User-License-Agreement-0c7cfdcb0b3b41c298cd9046fba1d748?source=copy_link Privacy Policy: https://www.notion.so/STACK-D-PRIVACY-POLICY-76b99a05b369499cabeaf73416a5d431?source=copy_link
Screenshots
Verdict
The clearest difference is in-app purchases: Du Contracts at none against Stack'd's 2. Du Contracts also leads on iOS requirement (13.0 vs 15.1). On price, ads 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
Both are free to download. Stack'd sells 2 in-app purchases, starting at $4.99 per month. Du Contracts asks for nothing beyond the download.
| Parameter | Du Contracts | Stack'd |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (2 ratings) — better | — |
| Number of ratings | 2 — better | — |
| Update frequency | Every 3 days | — |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 13.0 — better | 15.1 |
| Further details — not scored | ||
| Size | 19 MB | 41 MB |
| Age rating | 4+ | 4+ |
| Developer | Dylan Kramer | Oladimeji Ipaye |
In-app purchases
Du Contracts
No in-app purchases
Stack'd
- Stack'd Premium - Monthly$4.991 Month
- Stack'd Premium - Yearly$34.991 Year









