
Collectr
Card Ladder
Alt
PokeScope
CardIndex
TCG Stacked
My Card Inventory
CollX (“collects”) answers the age-old question: “What’s it worth?” The app can scan any baseball, football, or basketball card and instantly ID it and get the avg market value.

Substack
Formo.so
Advanced analytics for Substack writers. Runs 100% locally, no cloud, no subscription. Discover your superfans, churn risk, and cohort retention.

Which is more popular?
Based on our record, CollX should be more popular than StackStats.app. It has been mentioned 3 times since March 2021.
Website, pricing, platforms and company facts side by side.
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| Website | collx.app | stackstats.app |
| Pricing | — | |
| Company | — | Startup from the United Arab Emirates · 1 - 9 employees · 2026 |
| Listed in |
In their own words, as submitted to SaaSHub.


No description of CollX yet.
StackStats is a local desktop app for serious Substack writers. Import your CSV exports and get analytics Substack doesn't show you: bot-filtered open rates, cohort retention, dead subscriber detection, superfan ID, content-to-growth correlation, and an optional AI layer (supports Ollama,...
What each product offers, as listed by its team.


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


No analysis of CollX yet.
Overall verdict
Why this product is good
Recommended for
Walkthroughs and reviews on video.
Is CollX an App worth getting?
More videos
No StackStats.app videos yet. You could help us improve this page by suggesting one.
How often each product is chosen within a category, 0–100% relative to the other.


As answered by people managing CollX and StackStats.app.
StackStats.app's answer:
I built StackStats because Substack's native analytics weren't cutting it. I wanted cohort data, real open rates (not bot-inflated), and a way to identify which posts were actually driving subscriber growth — but every tool I found was either cloud-based or required migrating off Substack entirely. So I built a local app that works with Substack's own CSV exports. No migration, no cloud, no subscription.
StackStats.app's answer:
StackStats runs 100% locally on your machine — your subscriber data never touches a server. It also goes far beyond what Substack shows natively: bot-filtered open rates, cohort retention, superfan identification, dead subscriber detection, and content-to-growth correlation. No subscription, no account, no cloud. Pay once, own it forever.
StackStats.app's answer:
Most newsletter analytics tools are cloud-based SaaS with monthly subscriptions. StackStats is a one-time purchase that runs entirely on your device. For Substack writers who care about privacy — especially those with paid subscribers — that's a meaningful difference. You also get analytics features that don't exist anywhere else, like bot-filtered open rates and cohort retention, without having to migrate away from Substack.
StackStats.app's answer:
Serious Substack writers who are frustrated by Substack's shallow native analytics and want real data to drive growth — without moving their subscriber data to the cloud.
StackStats.app's answer:
Electron (macOS + Windows), HTML/CSS/JavaScript, Chart.js, PapaParse. Optional AI layer supports Ollama, Claude, GPT-4, Gemini, Groq, and OpenRouter. Licensing via Cloudflare Workers + D1. Payments via Gumroad.
Share your experience with using CollX and StackStats.app. For example, how are they different and which one is better?
Recommendations tracked on public social media and blogs since March 2021.


I'd recommend starting with something like collx.app to scan the cards and get a rough sense of value. If it's past your threshold (say $50) then you can look into the pricing history a bit more. The best tools for that would probably... Source: over 3 years ago
You can use a tool like collx.app to scan each card and check how much they're selling for. If you want to look at graded copies for each card you can use cardboard.market to search up the card + the grade and see sold listings and also... Source: over 3 years ago
I started using CollX, an app to helps me figure out how much my trading cards are worth. You should get it, too! Check out my collection and add yours. Use my referral code, NZ3SY, when signing up. http://collx.app. Source: over 4 years ago
I'm working on 3 products now: 1. FormBeep(https://formbeep.com) at $38 MRR now - A form to Whatsapp tool. Stack is mainly CF workers with Clerk Auth. 2. SlashLink(https://slashlink.app) $0 - A simple pay as you go amazon link localizer.... - Source: Hacker News / 3 days ago
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