Simple Task Manager vs IOU Slip
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Simple Task Manager
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Too many tasks. Too many lists. Nothing gets done. One Task is a simple, minimalist task manager built around one idea: focus on one task at a time. Instead of filling another endless to-do list, One Task lets you set just one main task. No overwhelming backlog. No constantly changing priorities. Just one clear thing to focus on right now. Do one thing. Finish it. Then move on. ■ FOCUS ON ONE TASK You can have only one main task at a time. This simple constraint removes the question of “What should I do next?” and helps you stay focused on what matters most. ■ BREAK BIG TASKS INTO SMALL STEPS A task can feel overwhelming when you don’t know where to start. Break your main task into up to 5 smaller, actionable subtasks and tackle it one step at a time. ■ AUTOMATIC TASK ARCHIVE Finished a task? It’s automatically moved to your archive. Look back at what you’ve accomplished or restore a previous task whenever you need it. ■ SAVE IT FOR LATER WITH VAULT Thought of something else you need to do? Put it in Vault instead of interrupting your current task. Save ideas and future tasks for later while keeping your attention on what matters right now. ■ AI SUBTASK BREAKDOWN Not sure how to get started? Enter your main task and let AI break it down into clear, actionable subtasks. Choose only the suggestions that make sense for you and add them with a tap. Free users can try AI Subtask Breakdown once per day. Subscribe to AI Subtask Breakdown to increase your subtask limit from 5 to 10, for both AI-generated and manually added subtasks. ONE TASK IS FOR YOU IF: • Your to-do list keeps getting longer • Too many tasks make it hard to decide where to start • You want a simple task manager without unnecessary complexity • You struggle with procrastination or task overwhelm • You want to focus on one thing at a time • You like breaking big tasks into smaller steps • You want a cleaner way to manage work, study, or daily tasks • Traditional productivity apps feel like too much work Most task managers help you manage more tasks. One Task helps you focus on fewer. Stop managing everything. Start finishing one thing. One Task — one task at a time. No accounts. No complex features. Just one task at a time. Privacy policy https://hushed-coriander-11e.notion.site/One-Task-2c6a05a584c080bf8deaf1b8fc434267 Term of use https://app.notion.com/p/One-Task-2c7a05a584c080029193ec23640a0c7e
IOU Slip
This app helps you record personal promises and favors, focusing on relationships and trust rather than monetary debt. It serves as a digital reminder of bonds between people, like offering a massage or a future coffee. It's designed to cherish connections and the spirit of giving.
- Record personal promises
- Track favors and bonds
- Digital note of promises
- Focus on relationships
- Reminder of trust
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IOU Slip Keep the promise. Record bonds, not debt. In modern life, everything is settled with money. But real relationships are not meant to be cleared. IOU Slip is a lightweight app to record promises, favors, and unspoken bonds between people — not as money, but as memory. What is an IOU Slip? An IOU Slip is a digital note of a promise: • “I owe you a massage.” • “Next coffee is on me.” • “I’ll help you anytime.” It’s not a debt. It’s a reminder of trust.
Screenshots
Verdict
The clearest difference is in-app purchases: IOU Slip at none against Simple Task Manager's 3. IOU Slip also leads on update cadence (every 4 days vs every 3 weeks). On price, ads, device support 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. Simple Task Manager sells 3 in-app purchases, starting at $3.99 per month. IOU Slip asks for nothing beyond the download.
Simple Task Manager ships an update every 3 weeks, IOU Slip every 4 days. The most recent releases landed on October 15, 2026 and October 11, 2026 respectively.
| Parameter | Simple Task Manager | IOU Slip |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (2 ratings) — better |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | — | 2 — better |
| Update frequency | Every 3 weeks | Every 4 days — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | — | Free |
| Devices | iPhone, iPad — better | iPhone |
| Requires iOS | 17.6 | 17.6 |
| Further details — not scored | ||
| Size | 1 MB | 4 MB |
| Age rating | 4+ | 17+ |
| Developer | KAZUHO MOROFUJI | GROUPOO PTE. LTD. |
In-app purchases
Simple Task Manager
- One Task AI Monthly$3.991 Month
- OneTask AI Yearly$24.991 Year
- One Task Plus$1.99
IOU Slip
No in-app purchases









