Software Alternatives, Accelerators & Startups

Altstore VS ForthWrite

Compare Altstore VS ForthWrite and see what are their differences

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Altstore logo Altstore

A home for apps that push the boundaries on iOS

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
  • Altstore Landing page
    Landing page //
    2023-08-03
  • 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.

Altstore

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

Altstore features and specs

  • No Jailbreak Required
    AltStore lets users sideload apps without needing to jailbreak their iOS device, preserving device security and warranty.
  • Free
    AltStore offers a free tier that allows users to sideload up to three apps.
  • Delta Emulator
    AltStore facilitates the installation of the Delta Emulator, allowing users to play classic games on their iOS device.
  • Regular Updates
    The app receives regular updates, adding new features and improving stability.
  • Open Source
    AltStore is open-source, making it transparent and allowing developers to contribute to its improvements.

Possible disadvantages of Altstore

  • Limited Apps on Free Tier
    The free version only allows the installation and regular updating of up to three apps, which could be limiting for power users.
  • Mac or Windows PC Required
    To install AltStore, a Mac or Windows PC is required, which might be inconvenient for some users.
  • Requires Wi-Fi Syncing
    AltStore needs periodic re-signing of apps via Wi-Fi syncing with a computer, which could be cumbersome.
  • Apple ID Requirement
    Using AltStore requires an Apple ID, raising potential privacy concerns for users wary of sharing their credentials.
  • Technically Complex
    The initial setup process can be complex and challenging for users who are not tech-savvy.

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 Altstore

Overall verdict

  • AltStore is a reliable and safe option for those looking to experiment with apps outside of the official Apple ecosystem, particularly for users who do not want to jailbreak their devices. It is well-regarded in the iOS community for its innovative approach to sideloading apps while maintaining system security and stability. However, users should still proceed with caution and understand the risks associated with using any third-party app installations.

Why this product is good

  • AltStore is a third-party app store for iOS devices that allows users to install applications that are not available on Apple's App Store. It is primarily appealing because it works without the need for jailbreaking the device, making it more accessible and less risky for users who want to try out apps that Apple might not have approved. AltStore uses a clever workaround by leveraging a developer feature in iOS that allows users to sideload apps using their Apple ID. This method is seen as safer and less intrusive than traditional jailbreaking methods. Furthermore, AltStore supports a range of applications, including emulators and apps that offer expanded features when compared to standard App Store offerings.

Recommended for

  • iOS users who are interested in trying apps that are not available on the official App Store.
  • Individuals looking to explore emulators and other experimental applications on their Apple devices.
  • Users who want to sideload apps without jailbreaking their iOS devices.

Altstore videos

How to install the AltStore and NEVER get Revoked again!

More videos:

  • Tutorial - How To Install AltStore On iOS 13! (iPhone, iPad, iPod)

ForthWrite videos

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

Add video

Category Popularity

0-100% (relative to Altstore and ForthWrite)
Online Services
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 Altstore 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 Altstore and ForthWrite

Altstore Reviews

We have no reviews of Altstore yet.
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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, Altstore seems to be more popular. It has been mentiond 478 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.

Altstore mentions (478)

  • Italian Competition Authority Fines Apple $115M for Abusing Dominant Position
    > One of the first links is leading to MacPaw's website. Yikes, Google results are bad these days! They seem to focus on Mac applications, not iOS app store alternatives. > But are there any real 3rd-party AppStores for iOS now? Yes, the main one I am familiar with is AltStore: https://altstore.io However, according to Apple's docs, they only allow alternative app stores in the EU and Japan, so you have to be... - Source: Hacker News / 6 months ago
  • Y Combinator Files Brief Supporting Epic Games
    > Of course Apple would never go for that They do in EU, because they were forced to. AltStore PAL https://altstore.io/ Buildstore https://builds.io/ Aptoide https://en.aptoide.com .. And so on. - Source: Hacker News / 10 months ago
  • Y Combinator Urges the White House to Support Europe's Digital Markets Act
    That is listed under "unofficial sideloading methods". A more accurate title would've been "Does iOS support sideloading?" but I wanted to keep the domain name as short as possible :) The Apple Developer program is not intended as an option for end users to enable sideloading on their device, even if that is a side effect of joining it. It is only intended to allow developers to briefly test their apps in a... - Source: Hacker News / over 1 year ago
  • Apple must open iPadOS to sideloading within 6 months, EU says
    AltStore (https://altstore.io/) is available, but only has two apps last time I checked. - Source: Hacker News / about 2 years ago
  • A first look at Europe's alternative iPhone app stores
    AltServer from the AltStore folks allows you to automate the renewal of sideloaded apps. Itโ€™s not perfect, but itโ€™s an excellent workaround. http://altstore.io/. - Source: Hacker News / about 2 years ago
View more

ForthWrite mentions (0)

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

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Lavender - Realtime coaching for sales emails.