Software Alternatives, Accelerators & Startups

RunKeeper VS ForthWrite

Compare RunKeeper VS ForthWrite and see what are their differences

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.

RunKeeper logo RunKeeper

Join the community of over 45 million runners who make every run amazing with Runkeeper. Track your workouts and reach your fitness goals!

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
  • RunKeeper Landing page
    Landing page //
    2023-03-23
  • 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.

RunKeeper

Pricing URL
-
$ Details
-
Platforms
-
Release Date
-
Startup details
Country
United States

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

RunKeeper features and specs

  • Comprehensive Tracking
    RunKeeper offers detailed tracking of various activities including running, walking, cycling, and other cardio exercises using GPS.
  • User-Friendly Interface
    The app features an easy-to-navigate interface, making it accessible for users of all technical skill levels.
  • Personalized Fitness Plans
    RunKeeper provides personalized fitness plans and goals based on user input and activity history.
  • Social Features
    Users can share their progress with friends, participate in challenges, and encourage each other to stay motivated.
  • Integration Capabilities
    The app integrates seamlessly with other popular fitness devices and apps, including Fitbit, MyFitnessPal, and Apple Health.
  • Audio Cues
    RunKeeper provides audio cues during workouts to keep users informed about their pace, distance, and time.

Possible disadvantages of RunKeeper

  • Premium Features
    Some of the more advanced features and detailed analytics are only available through a paid subscription.
  • Battery Consumption
    Continual use of GPS tracking can significantly drain the battery life of a mobile device.
  • App Stability
    Some users report occasional bugs and crashes, particularly after updates.
  • Limited Indoor Tracking
    The app does not track indoor activities, such as treadmill running, as accurately as outdoor activities.
  • Data Privacy
    Users need to be cautious about their data privacy, as the app collects a significant amount of personal fitness data.

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 RunKeeper

Overall verdict

  • Overall, RunKeeper is a great tool for both beginners and advanced users who want to keep track of their fitness activities. Its combination of features, ease of use, and ability to personalize workouts make it a popular choice among fitness enthusiasts.

Why this product is good

  • RunKeeper is widely considered a good fitness app due to its user-friendly interface, extensive features for tracking various physical activities such as running, cycling, and walking, and its ability to sync with other fitness devices and apps. It provides detailed insights into your performance, goals, and progress over time, which can be motivating for many users.

Recommended for

    RunKeeper is recommended for individuals who are looking for a reliable app to track their running and other cardio workouts. It is suitable for those who want to set personal fitness goals, monitor their progress, and need some motivation through challenges and community support. Both casual exercisers and serious athletes can benefit from the app.

RunKeeper videos

Runkeeper App Review

More videos:

  • Review - The BEST iPhone Running Apps! - RunKeeper Pro and Nike+ GPS Review - Apps to Help You Train!
  • Review - 10k Training | Intervals with Runkeeper

ForthWrite videos

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

Add video

Category Popularity

0-100% (relative to RunKeeper and ForthWrite)
Health And Fitness
100 100%
0% 0
Writing Tools
0 0%
100% 100
Sport & Health
100 100%
0% 0
Email
0 0%
100% 100

Questions & Answers

As answered by people managing RunKeeper 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

Share your experience with using RunKeeper and ForthWrite. For example, how are they different and which one is better?
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Reviews

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

RunKeeper Reviews

Top 10 App Like Strava. If you want to build an app likeโ€ฆ | by Vikas Agrawal | Medium
RunKeeper offers a personalized running experience with training plans and audio cues. Itโ€™s an excellent choice for runners looking to improve their performance and achieve new milestones.
Source: medium.com
10 Best Strava Alternatives Apps (2023) โ€“ Apps Like Strava
On top of the list, we are presenting the Runkeeper powered by the famous sports brand ASICS. The handy app can count the distance you covered, the pace, and the calories burnt. Also, provide audio updates while you run.
Source: techdator.net
14 Best Strava Alternatives and Similar Apps
Many are wondering why people compare RunKeeper vs. Strava. Why is it? Both are popular with runners, but RunKeeper is chosen as the best because of its flexible running logs where you could add your runs manually.
10 best fitness tracker apps for Android
Runkeeper is a fitness tracker app for runners. It tracks things like distance, pace, and frequency of your runs. The app has support for Wear OS devices as well as other apps like MyFitnessPal. It works pretty well. You basically hit the go button and then start running. The app does the rest. It also includes a stopwatch mode for things like indoor cardio via treadmill. It...

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, RunKeeper seems to be more popular. It has been mentiond 1 time 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.

RunKeeper mentions (1)

  • Top 3 Toronto Summer Running Tips
    Runkeeper: Asicsโ€™ fitness tracker is available for iOS and Android and does just about everything in terms of route planning, activity tracking, and metrics. 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 RunKeeper and ForthWrite, you can also consider the following products

Runtastic - Runtastic offers a series of fitness apps that can be used to track your running, walking, hiking, and cycling, as well as many other fitness routines. Read more about Runtastic.

Superhuman - Superhuman is an email management tool.

Strava - The #1 app for runners and cyclists

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.

MyFitnessPal - Track the number of calories that you consume each day with MyFitnessPal. The app also lets you create a diet and track the exercise that you complete each day whether it's walking, running or some other type of program.

Lavender - Realtime coaching for sales emails.