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TODO.73.nu VS Opalstack

Compare TODO.73.nu VS Opalstack and see what are their differences

TODO.73.nu

A simple, fast, and private TODO app with sync, recurring tasks, and offline support.

TODO.73.nu Landingpage with some todos and folders
Rating
0 reviews
Pricing
Open source Free
Alternatives Is it good?
Opalstack

Managed Hosting for developers, entrepreneurs, and businesses like yours

Opalstack Landing page
Rating
0 reviews
Alternatives Is it good?
EatAWhale
A habit and interest tracker for everything you care about. Set your own cadence, daily to monthly, and streaks follow your schedule. Buy once for $21, no subscription. sponsored
Note: These products don't have any matching categories. If you think this is a mistake, please edit the details of one of the products and suggest appropriate categories.

Base details

Website, pricing, platforms and company facts side by side.

TODO.73.nu
Opalstack
Website todo.73.nu opalstack.com
Pricing
Open source Free
Official pricing
Company Startup from Germany · 2026 —
Listed in
Task Management Todos Reminders Checklists To-Do Lists +2
Hosting Web Hosting Managed Hosting Cloud Hosting +1

About TODO.73.nu and Opalstack

In their own words, as submitted to SaaSHub.

TODO.73.nu
Opalstack

TODO is a fast, private task manager that runs entirely in your browser. Create one-time, recurring, or date-range tasks with flexible scheduling. From simple daily reminders to biweekly spans with completion targets. Organize tasks into color-coded folders and arrange them in your preferred...

Read more about TODO.73.nu

No description of Opalstack yet.

Features and specs

What each product offers, as listed by its team.

TODO.73.nu 9 features
Opalstack 5 features
  • Flexible Scheduling
    Single-day, date-range, and recurring tasks. Daily, weekly, biweekly, monthly, and yearly options.
  • Span Mode
    Define a recurring day range (e.g. Friday to Sunday) with a completion target instead of rigid daily schedules.
  • Range Targets
    Set how many times a task should be completed within a date range.
  • Folders & Custom Ordering
    Color-coded folders to organize tasks. Drag and drop to arrange tasks.
  • Encrypted Sync
    Sync across devices with a single key. AES-256-GCM encryption, PBKDF2 key derivation. The server never sees your data.
  • Offline PWA
    Install to your home screen. Works fully offline with service worker caching.
  • Import / Export
    Backup and restore all data as JSON. Merge or overwrite on import.
  • Theming
    Dark and light mode with auto-detection. Custom accent color.
  • Privacy by Design
    No accounts, no cookies, no analytics. All data stays on-device unless sync is explicitly enabled.
  • Developer-Friendly Hosting
    Opalstack is designed with developers in mind, offering SSH access, Git integration, and support for multiple programming languages and frameworks including Python, Node.js, Ruby, and PHP, giving developers granular control over their hosting environment.
  • Affordable Pricing
    Opalstack offers competitive pricing for shared and managed hosting plans, making it an accessible option for small businesses, freelancers, and individual developers who need robust features without enterprise-level costs.
  • Modern Control Panel
    Opalstack provides a clean, modern, and intuitive web-based dashboard for managing sites, applications, databases, and email accounts, which is a significant improvement over older-style hosting control panels like cPanel.
  • Strong Support for Multiple Applications
    The platform supports a wide variety of application types including WordPress, Django, Flask, Express, static sites, and more, allowing users to host diverse projects on a single account with easy deployment.
  • Reliable Infrastructure and Support
    Opalstack is built by former WebFaction team members, bringing experienced hosting expertise. They offer responsive customer support and a reputation for stable, well-managed server infrastructure with good uptime.

Possible disadvantages

  • Smaller Community and Ecosystem
    Compared to major hosting providers like DigitalOcean, AWS, or even shared hosts like SiteGround, Opalstack has a smaller user base, which means fewer community tutorials, third-party guides, and forum discussions available for troubleshooting.
  • Limited Scalability Options
    Opalstack is primarily a shared hosting provider, which means it may not be the best choice for high-traffic applications or projects that require rapid, on-demand scaling of resources like CPU, RAM, or storage.
  • Not Ideal for Beginners
    While developer-friendly, Opalstack's approach can be intimidating for non-technical users. Setting up applications often requires familiarity with the command line and server configuration, which may not suit those looking for simple one-click solutions.
  • Limited Data Center Locations
    Opalstack offers a relatively small number of data center locations compared to major cloud providers, which may result in higher latency for users targeting audiences in regions not well-served by the available server locations.
  • Fewer Managed Services and Add-ons
    Unlike larger hosting platforms, Opalstack lacks a wide range of managed add-on services such as built-in CDN integration, managed backups with granular restore options, or one-click SSL management that more mainstream providers offer out of the box.

Analysis

An editorial look at what each product does well and who it suits.

TODO.73.nu
Opalstack

Overall verdict

  • TODO.73.nu appears to be a minimalist, lightweight to-do and task management tool that can be a good fit for users who value simplicity and speed over feature-heavy platforms. However, without independent verification of its uptime, security practices, and data handling, users should evaluate it carefully before relying on it for critical tasks.

Why this product is good

  • Likely offers a clean, distraction-free interface for quick task capture
  • Minimalist tools tend to load fast and require little setup
  • May be free or low-cost, making it accessible for casual users
  • Simple task managers are easy to learn with minimal onboarding

Recommended for

  • Individuals who want a simple, no-frills to-do list
  • Users who prefer lightweight web tools over full project management suites
  • People managing personal tasks rather than complex team workflows
  • Anyone looking for a quick, temporary task-tracking solution

Overall verdict

  • Opalstack is a solid choice for developers and tech-savvy users seeking an affordable, flexible control panel hosting solution with good performance and transparent pricing, though it may require more technical know-how than mainstream cPanel hosts.

Why this product is good

  • Uses a custom lightweight control panel that's fast and efficient compared to resource-heavy alternatives like cPanel
  • Offers straightforward, transparent pricing without hidden fees or aggressive upselling
  • Provides SSD storage and solid server performance for the price point
  • Supports multiple app types including Python, Node.js, and various frameworks beyond typical PHP hosting
  • Founded by the original creators of WebFaction, bringing significant hosting industry experience
  • Good for running multiple websites/apps under one account with granular resource control
  • Responsive customer support with a knowledgeable team
  • No long-term contracts required, allowing flexibility

Recommended for

  • Developers who need support for Python, Node.js, or other non-PHP applications
  • Users comfortable with a more technical, non-cPanel control panel interface
  • Small businesses or freelancers hosting multiple websites who want granular control
  • Former WebFaction users looking for a similar service after its shutdown
  • Budget-conscious users who want VPS-like flexibility without full server management
  • Users who prioritize transparent pricing over bundled marketing extras

Category popularity

How often each product is chosen within a category, 0–100% relative to the other.

Score bands 0–20 21–40 41–50 51–60 61–100
TODO.73.nu
Opalstack
100% 100%
Task Management
0% 0%
0% 0%
Hosting
100% 100%
100% 100%
Todos
0% 0%
0% 0%
Managed Hosting
100% 100%

Questions & Answers

As answered by people managing TODO.73.nu and Opalstack.

What makes your product unique?

TODO.73.nu's answer

Span mode. Most todo apps force tasks into rigid daily checkboxes or single deadlines. TODO.73.nu lets you define recurring time windows with completion targets. "Exercise 3 times this week" tracks across Monday to Sunday and stops showing up for that time span, after checking it three times. On top of that, optional sync is end-to-end encrypted so the server can't read your tasks. No accounts, no sign-up, just a shared key.

Why should a person choose your product over its competitors?

TODO.73.nu's answer

Because it handles scheduling patterns that Todoist, Apple Reminders, and Google Tasks simply can't. "Do this 2 times between Monday and Friday." "Complete this 4 times within this date range." Those tools don't understand flexible windows. Beyond that, it's fast, private, and simple. No tracking, no ads, works offline, loads instantly, and your data stays yours.

How would you describe the primary audience of your product?

TODO.73.nu's answer

People who think in time blocks rather than strict daily routines. You want to run three times this week but don't care which days. You need to finish something within a project window and want to see progress without micromanaging individual dates. Privacy matters to you, but you also just want something that works without creating yet another account.

What's the story behind your product?

TODO.73.nu's answer

I wanted a simple way to track tasks that need to happen a certain number of times within a flexible window. Exercise 3 times this weekend. Finish something 5 times during a two-week stretch. Every app I tried forced per-day schedules. None of them got the concept of "X times within this span." So I built it. Span mode was the reason this app exists. Everything else (encrypted sync, offline support, the minimal design) grew around it because I wanted something I could actually use every day without giving up privacy or dealing with bloat.

Which are the primary technologies used for building your product?

TODO.73.nu's answer

Vanilla HTML, CSS, and JavaScript. No frameworks, no build tools, no dependencies. The whole app is a single HTML file. Encryption runs through the browser's native Web Crypto API (AES-256-GCM, PBKDF2). Service Workers handle offline use and PWA installation. LZ-String compresses data in localStorage. The backend is a small PHP script that only stores encrypted blobs and never sees your actual data. The whole thing is deliberately simple and self-hostable.

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