Math before
the next scroll.

At a glance

Name

Blob: Screen Time Control

What it does

Blob is a screen-time app for iPhone and Android that asks you to solve a math problem before accessing selected distracting apps.

Price

Free download; subscription required for features. US listings: $4.99/week, $8.99/month, $39.99/year. See offers and details below.

Platform

iPhone · iOS 18.0 or later; Android · Android 8.0 or later

First released

June 24, 2026

Developer

Spam Musubi Technologies LLC · United States

Links

App Store · Google Play · Website

One sentence

Blob is a screen-time app for iPhone and Android that asks you to solve a math problem before accessing selected distracting apps.

One paragraph

Blob adds a deliberate pause to the habit of opening distracting apps. Users choose which apps to protect, then solve a math challenge to earn temporary access or choose to walk away. Its mascot accompanies the interaction, and activity tracking records interceptions, solved gates, and walk-aways. Blob supports iOS 18 or later and Android 8 or later. Its features require a subscription.

Full description

Picking up a phone to check one thing can turn into opening a distracting app out of habit. Blob is designed to interrupt that moment with a math challenge before access to selected apps.

Users choose the apps they want to protect. When they encounter a gate, they can solve the problem for a short unlock pass or choose to walk away. Challenge options range from arithmetic to algebra and derivatives. Hard Hours make access more demanding during a chosen time window.

Blob’s animated mascot accompanies the experience. The app tracks interceptions, solved gates, walk-aways, and streaks. Time avoided is an estimate based on walk-aways and an assumed session length, not a direct measurement of time a person would otherwise have spent scrolling.

Blob: Screen Time Control is available for iPhone running iOS 18 or later and Android 8 or later. It is free to download; its features require a subscription. Current US App Store subscription listings and offer details are below.

Features

• Protect selected distracting apps.
• Solve a math challenge to earn temporary access.
• Choose to walk away instead of continuing.
• Select challenges from arithmetic through harder math.
• Use Hard Hours to increase difficulty during a chosen window.
• Track interceptions, solved gates, walk-aways, and streaks.

Raw screenshots

Unframed, full-resolution PNGs. Each image is 1320 × 2868 pixels. Select an image to view the original, or use its download link.

Screenshots use demonstration data and illustrative app selections. Time-avoided figures are estimates, not measured outcomes. UI may vary with version and settings.

Icons & mascot

App icon

1024 × 1024 PNG ↓
512 × 512 PNG ↓
256 × 256 PNG ↓

Blob mascot

Transparent PNG ↓

About the developer

Blob is developed by Spam Musubi Technologies LLC, a software company based in the United States. The app focuses on the moment before opening a distracting app, using a math challenge to prompt a deliberate choice.

Press contact

Brian · blob@spammusubitech.com

For product questions, interview requests, or help evaluating Blob, please get in touch.