Software Alternatives, Accelerators & Startups

Time Sink VS ForthWrite

Compare Time Sink VS ForthWrite and see what are their differences

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Time Sink logo Time Sink

Time Sink helps you track how you spend your time on your Mac.

ForthWrite logo ForthWrite

Email that sounds like you, and gets measurably more like you every week. Drafts in Gmail, Outlook, and the browser. Free to start.
Visit Website
  • Time Sink Landing page
    Landing page //
    2021-09-16
  • ForthWrite Landing Page
    Landing Page //
    2026-06-19
  • ForthWrite Dashboard
    Dashboard //
    2026-06-19
  • ForthWrite In Gmail
    In Gmail //
    2026-06-19
  • ForthWrite Pricing
    Pricing //
    2026-06-19

ForthWrite is an AI email writing assistant for Gmail and Outlook that learns your writing style from your real sent mail. The more you use it, the more it sounds like you. Get smart drafts in seconds, auto-draft replies before you open your inbox, and maintain your personal voice at scale. Free to start, no credit card required. Works inside Gmail and Outlook on the web.

How it works

ForthWrite captures your tone, sentence rhythm, and sign-offs from your actual sent emails, then uses that profile to generate drafts that match how you write, not a generic AI voice. Every draft you edit or send improves the model over time.

Key features

  • Auto-draft: replies waiting in Gmail before you open your inbox
  • Voice matching from your real sent mail, not templates
  • Recipient-aware drafts that adapt to who you are emailing
  • Prompt Lab for version-controlling and A/B testing your persona prompt
  • BYOK support: bring your own API key for Claude, OpenAI, Grok, Mistral, and more
  • Works in Gmail and Outlook on the web, plus a standalone browser widget
  • Training data export and full data portability

Who uses it

Professionals who send high volumes of relationship-critical email: lawyers, financial advisors, recruiters, account executives, founders, and anyone who wants their inbox handled without sounding like a chatbot wrote it.

Pricing

Free tier includes 10 drafts per week with no credit card required. Paid plans start at $12/month and include unlimited drafts, custom persona prompts, and auto-draft.

Time Sink

Pricing URL
-
$ Details
-
Platforms
-
Release Date
-

ForthWrite

$ Details
freemium $12.0 / Monthly (Standard plan)
Platforms
Web
Release Date
2026 June
Startup details
Country
United States
State
California
City
San Diego
Founder(s)
Curtis Boortz
Employees
1 - 9

Time Sink features and specs

  • Detailed Activity Tracking
    Time Sink offers detailed tracking of how much time you spend on different applications and tasks, helping you better understand your productivity patterns.
  • Customizable Reports
    The software provides customizable reports, allowing you to view your activity data in various formats, making it easier to analyze and interpret.
  • Idle Time Detection
    Time Sink automatically detects and adjusts for idle time, ensuring that your activity reports are more accurate and reflective of your actual work habits.
  • Automatic Time Logging
    The application automatically logs your time spent on different tasks without requiring manual input, which simplifies the process of time tracking.
  • User-Friendly Interface
    Time Sink features a clean and intuitive interface, making it easy for users of all levels of technical proficiency to navigate and use the application.

Possible disadvantages of Time Sink

  • Mac-Only
    Time Sink is only available for macOS, which limits its usability for users on other operating systems like Windows or Linux.
  • Paid Software
    Time Sink is not free; users must purchase a license to use the software, which could be a deterrent for those looking for free alternatives.
  • Limited Integration
    The application offers limited integration with other productivity tools and platforms, which might be a drawback for users who rely on multiple tools for their workflow.
  • No Mobile Version
    There is no mobile app version of Time Sink, restricting its use to desktop environments and limiting its flexibility for users who need to track time on the go.
  • Learning Curve for Advanced Features
    While the basic interface is user-friendly, some of the more advanced features may require a learning curve to fully utilize.

ForthWrite features and specs

  • Voice Matching
    Learns from your real sent mail, not templates
  • Auto-draft replies
    Replies waiting in Gmail before you open your inbox
  • Batch-drafting
    Draft replies for your entire inbox with one click
  • Works in browser
    Gmail, Outlook, and web browsers
  • BYOK support
    Claude, OpenAI, Grok, Mistral, and more
  • Prompt Lab
    Version control and A/B test your persona prompt
  • Free tier
    10 drafts per week, no credit card required

Analysis of Time Sink

Overall verdict

  • Overall, Time Sink is considered a useful tool for those looking to improve their time management skills. It offers a user-friendly interface and detailed reporting, making it easy to understand where your time is going and where adjustments can be made. However, as it is only available for macOS, users of other operating systems will need to look for alternatives.

Why this product is good

  • Time Sink, developed by Many Tricks, is designed to help users manage and analyze their time usage on a Mac. It provides detailed insight into how much time is spent on various applications and tasks, aiming to enhance productivity by identifying time sinks and helping users focus on their priorities.

Recommended for

  • Mac users who are looking to improve their focus and productivity.
  • Individuals who want to track their application usage and identify distractions.
  • Professionals who need detailed breakdowns of their computer usage for billing or personal productivity improvement.

Time Sink videos

Crit Hit Reviews The Watchmaker! Is it a solid Time sink?

More videos:

ForthWrite videos

No ForthWrite videos yet. You could help us improve this page by suggesting one.

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Category Popularity

0-100% (relative to Time Sink and ForthWrite)
Time Tracking
100 100%
0% 0
Writing Tools
0 0%
100% 100
Tool
100 100%
0% 0
Email
0 0%
100% 100

Questions & Answers

As answered by people managing Time Sink and ForthWrite.

Which are the primary technologies used for building your product?

ForthWrite's answer:

Next.js, React, Supabase, Anthropic Claude, OpenAI, Stripe, Vercel, Chrome Extensions API

What makes your product unique?

ForthWrite's answer:

ForthWrite learns your writing style from your actual sent mail, not a generic prompt. Every draft sounds like you wrote it because it was trained on how you actually write. It also auto-drafts replies before you open your inbox, so your email is partially handled before your day starts.

Why should a person choose your product over its competitors?

ForthWrite's answer:

Most AI email tools give you a blank box and a "write for me" button. ForthWrite builds a voice profile from your sent history and gets more accurate with every draft you edit or send. Unlike ChatGPT or Gemini, it works natively inside Gmail and Outlook with no copy-paste. Unlike Lavender, it writes the draft, not just scores it.

How would you describe the primary audience of your product?

ForthWrite's answer:

Professionals who send high volumes of relationship-critical email and cannot afford to sound generic: lawyers, financial advisors, recruiters, account executives, consultants, and founders managing their own inbox.

What's the story behind your product?

ForthWrite's answer:

Built out of frustration with AI writing tools that produce text that sounds nothing like the person sending it, and as a way to handle large amounts of daily email. The core insight was that your sent mail is the best training data you already have, and no tool was using it.

User comments

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Reviews

These are some of the external sources and on-site user reviews we've used to compare Time Sink and ForthWrite

Time Sink Reviews

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ForthWrite Reviews

  1. curtisboortz
    ยท Founder at ForthWrite ยท
    I built ForthWrite to fix generic AI email, and I still use it every day

    I built ForthWrite because I kept sending emails that sounded like they came from the same generic AI as everyone else. After launching it, I still use it for my own inbox every day, which is about the most honest endorsement I can give.

    The Chrome extension lives inside Gmail and Outlook on the web. Open a thread, hit Alt+Shift+D, and a draft comes back in your voice, not a template. The free tier is real: 10 drafts per week, no API key, no credit card. Voice matching is included on free, because that is the point.

    What keeps it useful compared to Gemini or a chat tab: it learns from what you actually send. Every edit you make before hitting send becomes a signal. Over time the drafts drift closer to how you really write, and the dashboard shows the improvement curve so you can see it happening.

    The web compose surface lets you draft from forthwrite.ai without installing anything, useful for people who want to try before committing to the extension.

    Standard adds recipient-aware and intent-aware drafting plus AI coaching. Pro adds auto-draft (replies waiting when you open Gmail), batch replies, and Prompt Lab for version-controlling your prompts. Teams adds a shared persona and seat-level analytics.

    ForthWrite is not for everyone. If you just need quick replies and tone does not matter, Gemini is free and already in your inbox. ForthWrite is for people where tone does matter: client communication, relationship-driven threads, external correspondence where sounding off costs something real.

    Disclosure: I am the founder and use it daily. Happy to answer questions in the comments.

    ๐Ÿ Competitors: Jace.ai, Fyxer, Mailmeteor
    ๐Ÿ‘ Pros:    Drafts land inside gmail and outlook; no copy-pasting from a chat window|Voice matching is on the free tier, not paywalled behind paid plans|No api key, no credit card to start; free tier runs on a server-side proxy|Learns from every edit you make before sending; drafts improve over time|Full keyboard flow: alt+shift+d to draft in any thread, no mouse required|Byok on paid plans, 9 providers supported, keys encrypted at rest|Web compose at forthwrite.ai works without installing the extension at all
    ๐Ÿ‘Ž Cons:    10 free drafts/week is enough to evaluate, not enough for a heavy inbox|Auto-draft, batch replies, and prompt lab all require the pro tier|Early-stage product; fewer third-party integrations than mature inbox tools|No mobile app: the extension and add-in are desktop-only (chrome on web, or the outlook desktop add-in)

Social recommendations and mentions

Based on our record, Time Sink seems to be more popular. It has been mentiond 5 times since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.

Time Sink mentions (5)

  • Information That Wonโ€™t Fit Inside Your Head: Journals with and Without Bullets
    I love that my job is sitting on my ass drawing stuff but there are definitely times when it is still Work that I have to force myself to keep doing. Sometimes I sort of sit there watching art fall out of my stylus. Sometimes I am Sisyphus muttering and cursing as I push this fucking stone up this fucking mountain for the millionth time. "Flow" is overrated IMHO. It's certainly worth building working methods that... - Source: Hacker News / almost 4 years ago
  • Take More Screenshots
    I've been happily using [Time Sink](https://manytricks.com/timesink/) by Many Tricks to do this for about a year now. It does not automatically merge into a timelapse, but this is accomplished easily with ffmpeg. - Source: Hacker News / almost 4 years ago
  • How much to charge for illustrations?
    I use Time Sink to help me track my time, you'll need something different if you're on Windows. Source: almost 4 years ago
  • Software Devs of /r/osx, I've moved from Linux to OSX and need to replace my Polybar workflow
    For time tracking I lean on Time Sink. If you want something more manual then I feel like there are a zillion task-tracking timers out there but I couldn't point you to any one in particular. Wikipedia says Toggl has an OSX app so maybe you wanna look at that one first. Source: over 4 years ago
  • How can I track my own computer usage?
    I've used this: https://manytricks.com/timesink/. Source: over 4 years ago

ForthWrite mentions (0)

We have not tracked any mentions of ForthWrite yet. Tracking of ForthWrite recommendations started around Jun 2026.

What are some alternatives?

When comparing Time Sink and ForthWrite, you can also consider the following products

Anti-Social - Anti-Social is a productivity application for Macs that turns off the social parts of the internet.

Superhuman - Superhuman is an email management tool.

Strict Workflow - Enforces the Pomodoro time management technique by blocking distracting sites

Gemini - Gemini, formerly known as Bard, is a generative artificial intelligence chatbot developed by Google. Based on the large language model (LLM) of the same name, it was launched in 2023 in response to the rise of OpenAI's ChatGPT.

ChatterBlocker - ChatterBlocker is the prime software to reduce the nearby conversationโ€™s distraction that allows you to focus on your work.

Lavender - Realtime coaching for sales emails.