Comparison

SINO vs Stackbox

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

SINO

Features
Read full description

I first discovered the idea behind SINO from a podcast describing Steve Jobs’ approach to work. SINO is a focus management tool designed for people who challenge themselves and move toward meaningful goals. It’s not just a timer. SINO helps you separate your day into Signal and Noise, so you can focus only on what truly matters. SINO is built for people who want their time to point in the right direction. Instead of simply tracking minutes, SINO distinguishes between Signal (high-value focus) and Noise (low-value tasks) to help you build real, measurable growth. Core Features Session Creation Create sessions to structure your day and manage your work with clarity. Signal & Noise Ratio See the quality of your work—not just the quantity. SINO visualizes where your time is actually going and helps you align your day with your goals. Project-Based Session Management Manage your study, side projects, or work tasks by project so you can allocate time efficiently across different goals. Focus Mode Block distracting apps and create a deep-focus environment for meaningful work. Signal Board & Data Analysis Visualize your daily focus pattern, Signal/Noise ratio, streaks, and more to understand how your focus evolves over time. Focus History & Heatmap See your monthly routines and consistency through a clear, color-coded heatmap. Designed with Minimalism in Mind SINO removes unnecessary complexity and keeps only what truly helps you focus. The interface is intentionally simple so that anyone can use it instantly, while still providing scientific and meaningful focus analytics. Based on the belief that “Today’s focus creates tomorrow’s growth,” SINO helps goal-oriented people make their days clearer, more meaningful, and more aligned with their long-term direction. Who Is SINO For? - Students who need structured study - Makers working on side projects - Developers, founders, and creators - Anyone who wants deep focus and consistent growth Eliminate the Noise. Follow the Signal. Your focus becomes your growth. Privacy Policy: https://super-focus-landing.vercel.app/privacy Terms of Use: https://super-focus-landing.vercel.app/terms

About

Stackbox

Read full description

Stackbox is a read-it-later app that helps you save web pages, articles, blog posts, social media links, and YouTube links, then organize them for comfortable reading later. Found something you want to read but don’t have time right now? Save it to Stackbox and keep your links neatly collected for later. You can also manage RSS feeds in Stackbox. Add RSS feeds from your favorite blogs, news sites, magazines, and websites, and check new posts in one place. If you find something you want to revisit, you can bookmark it from your feed. Saved links are cleaned up for a better reading experience. Stackbox reduces ads and unnecessary elements, turning pages into a focused reading view. Adjust the theme and font size to create a reading environment that feels right for you. Highlight important passages and add notes as you read. You can translate English or foreign-language articles, and save content for offline reading. Organize saved articles with tags and categories. Use search to quickly find links, articles, and blog posts you saved before. With iCloud sync, your reading stays up to date across iPhone, iPad, and Mac, so you can continue naturally from any device. Stackbox was built to help you do more than just save good content. It helps you come back to it, read it properly, and keep it useful. Recommended for people who: Save articles, blog posts, news, social media links, or YouTube links often Want an RSS reader or feed reader to follow posts from their favorite sites Want to bookmark and organize things to read later Like highlighting important passages and taking notes while reading Want to translate foreign-language articles or save content for offline reading Want to continue reading across iPhone, iPad, and Mac with iCloud sync Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://equal-starflower-cc6.notion.site/Stackbox-30658b41d1748030ac22db17505f979d?source=copy_link

Screenshots

SINO4 screens
Stackbox4 screens

Verdict

The call

The clearest difference is iOS requirement: Stackbox at 18.0 against SINO's 26.0. On price, update cadence, ads and in-app purchases there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. SINO sells 3 in-app purchases, starting at $3.99 per month and Stackbox sells 2 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

SINO ships an update every 5 days, Stackbox every 4 days. The most recent releases landed on October 8, 2026 and October 10, 2026 respectively.

Scorecard1 real difference · 5 level
SINO versus Stackbox: the parameters behind the verdict, then further details
ParameterSINOStackbox
PriceFreeFree
Update frequencyEvery 5 daysEvery 4 days — better
AdsNoNo
In-app purchasesYesYes
DevicesiPhone, iPadiPhone, iPad, Mac — better
Requires iOS26.018.0 — better
Further details — not scored
Size15 MB33 MB
Age rating4+4+
DeveloperGibeom LeeYunJae Jeong

In-app purchases

3 purchases

SINO

Subscriptions2
  • SINO Plus Monthly1 Month trial$3.991 Month
  • SINO Plus Annual2 Months trial$39.991 Year
One-time1
  • SINO Lifetime$19.99
2 purchases

Stackbox

Subscriptions2
  • Monthly Plan7 Days trial$1.991 Month
  • Yearly Plan7 Days trial$19.991 Year

Questions

Is SINO free?
SINO is free to download, with in-app purchases available.
Is Stackbox free?
Stackbox is free to download, with in-app purchases available.
Do SINO or Stackbox have ads?
Neither SINO nor Stackbox shows ads.
Which is updated more often, SINO or Stackbox?
SINO ships an update every 5 days, and Stackbox every 4 days. Most recently, SINO was updated on October 8, 2026 and Stackbox on October 10, 2026.

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