
iLoveIMG
iLovePDF
Squoosh
Smallpdf
CloudConvert
ImageOptim
Compressor.io
Make your website faster and save bandwidth. TinyPNG optimizes your PNG images by 50-80% while preserving full transparency!

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, TinyPNG seems to be a lot more popular than StackStats.app. While we know about 172 links to TinyPNG, we've tracked only 1 mention of StackStats.app.
Website, pricing, platforms and company facts side by side.
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|---|---|---|
| Website | tinypng.com | stackstats.app |
| Pricing | — | |
| Company | Startup from the Netherlands | Startup from the United Arab Emirates · 1 - 9 employees · 2026 |
| Listed in |
In their own words, as submitted to SaaSHub.


No description of TinyPNG 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.


Overall verdict
Why this product is good
Recommended for
Overall verdict
Why this product is good
Recommended for
Walkthroughs and reviews on video.
ShortPixel Review vs. Kraken & tinyPNG [AppSumo 2019]
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 TinyPNG 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 TinyPNG and StackStats.app. For example, how are they different and which one is better?
External articles and on-site reviews we used to compare the two products.


Another online tool to batch compress PNG images is TinyPNG. Also, it can compress photos with high quality. In addition, it also provides the function of downloading files to the cloud, and you can easily save PNG...
TinyPNG is a well-known free image optimization tool. It works great for JPEG and PNG image file compression. It supports up to 20 images, each not exceeding 5 MB, while a maximum of 100 images per month for free...
We have no reviews of StackStats.app yet. Be the first one to post
Recommendations tracked on public social media and blogs since March 2021.


Tiny makes an image smaller with one instruction. It sends the file to TinyPNG, replaces the original with the smaller version, and shows the result:. - Source: dev.to / 4 months ago
For images, tools like TinyPNG or Squoosh can reduce file sizes dramatically, often by 60-80%, with little to no visible quality difference. For your splash screen specifically, consider using a simple vector image (SVG) or even a plain... - Source: dev.to / 9 months ago
Optimizing PNGs: Always compress PNGs before using them on the web. Tools like ImageOptim, TinyPNG, or Squoosh can reduce file sizes dramatically. - Source: dev.to / 9 months 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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