Zero by Otto vs *slash
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Zero by Otto
This task management app offers a minimalist approach to productivity. Unfinished tasks automatically roll over to the next day, ensuring nothing gets lost. Organize tasks into projects, create reusable lists, and collaborate with others.
- Automatic task rollover
- Today view
- Drag and drop rescheduling
- Project organization
- Shared projects for collaboration
- Reusable checklists
- Desktop widget
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Zero - task management made simple. Zero takes a minimalist approach to getting things done. Tasks automatically roll over to the next day when incomplete, so nothing gets lost while keeping your focus on today. Key Features: Automatic Rollover – Unfinished tasks move to tomorrow, no manual rescheduling needed Today View – See what needs to be done today in one clean view Drag & Drop – Reschedule tasks between days with simple gestures Projects – Organize related tasks together Shared Projects – Collaborate with others by inviting them via email Lists – Create reusable checklists for routines and recurring workflows Favorites – Star important tasks to highlight them Desktop Widget (macOS) – Keep today's tasks visible on your desktop Minimal Design – Clean interface without unnecessary features Sync – Works seamlessly across iPhone, iPad, and Mac Dark Mode – Comfortable viewing any time of day Zero helps you stay organized without the complexity of traditional task managers. Tasks flow naturally from day to day, projects keep work organized, and lists handle your recurring needs.
*slash
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Slash is a minimal to-do list designed for your Dumb iPhone. Focus on what matters today without noise, streaks, or unnecessary features. Key Features • Quick tasks: add, check off, done • Home and Lock Screen widgets for instant access • Looping tasks for simple habit tracking • Built-in Pomodoro timer for deep focus • Gentle nudges you control with custom frequency and duration • Light and dark themes with adjustable text size • Works offline. No accounts. No tracking. • Daily reset keeps your list clean and intentional Open. Write. Close. Stay focused, on purpose.
Screenshots
Verdict
The clearest difference is update cadence: Zero by Otto at every 5 days against *slash's fortnightly. 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Zero by Otto ships an update every 5 days, *slash fortnightly. The most recent releases landed on October 6, 2026 and October 4, 2026 respectively.
| Parameter | Zero by Otto | *slash |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 5 days — better | Fortnightly |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad, Mac — better | iPhone, iPad |
| Requires iOS | 16.0 — better | 17.6 |
| Further details — not scored | ||
| Size | 13 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | Ludus-Language, Inc. | param kalaria |
In-app purchases
Zero by Otto
No in-app purchases
*slash
No in-app purchases









