Comparison

Smart Slide Rule vs No DoomScrolling

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

Head to head
About

Smart Slide Rule

This app simulates a mechanical analog calculating tool, offering various logarithmic scales for multiplication, division, and trigonometric functions. It includes instructions on how to use the slide rule, making it a learning tool for this historical device.

Highlights
  • Simulates a slide rule
  • Includes A, B, C, CI, D, S, L, T, and K scales
  • Moveable slide strip and cursor
  • Instructions on slide rule usage
  • Calculates multiplication, division, and functions
Features
Read full description

* An app simulating a slide rule! * Smart Slide Rule reproduces a slide rule (slipstick) with A, B, C, CI, D, S, L, T, and K scales. A slide rule is a mechanical analog calculating tool that uses the principle of logarithms. The slide rule appears as an important prop in the movies "Apollo 13" and "The Wind Rises". This application reproduces a slide rule on the screen of your device. The front side of the slide strip corresponds to the B, C, and CI scales, and the back side corresponds to the S, L, and T scales. You can move the slide strip and the cursor. * With instructions on how to use the slide rule! * The slide rule uses a logarithmic scale to calculate multiplication, division, exponentiation, square root, and trigonometric and logarithmic functions. This application features an explanation of how to use the slide rule, so you can learn how to calculate. Since the calculation is performed in pixels of the device screen, the accuracy of the calculation cannot be guaranteed.

About

No DoomScrolling

Read full description

Walk more. Scroll less. Feel better. Struggling with screen time? This app helps you break the cycle by turning walking into the key that unlocks your favorite apps and websites. Set the apps or web domains you want to limit, choose how much walking earns you screen time, and let healthier habits build themselves—step by step. How It Works • Select apps & websites to limit Social media, streaming, games—choose what you want to take control of. • Set your movement goals Decide how many steps unlock how much screen time. You set the rules. • Earn screen time by walking: The more you walk, the more time you earn to use the apps you’ve locked. • Get healthier without trying: Every scroll becomes a reason to walk. Healthier habits come naturally. Why You’ll Love It • Helps reduce mindless scrolling • Encourages daily movement in a simple, rewarding way • Builds sustainable habits backed by behavior science • Works automatically—no complicated setup • Customizable for your lifestyle and goals Take control of your digital life while feeling healthier and more energized every day. Walk your way to better habits—starting today. Privacy info: https://www.maadotaa.com/walk2scroll Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula

Screenshots

Smart Slide Rule2 screens
No DoomScrolling4 screens

Verdict

The call

The clearest difference is price: No DoomScrolling at Free against Smart Slide Rule's $0.99. No DoomScrolling also leads on update cadence (weekly vs every 2 months). Smart Slide Rule's advantage is in-app purchases (none vs 2) and iOS requirement (11.0 vs 18.6). On ads and device support 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

No DoomScrolling is free to download; Smart Slide Rule costs $0.99 up front. No DoomScrolling sells 2 in-app purchases, starting at $1.99 per 7 days. Smart Slide Rule asks for nothing beyond the download.

UpkeepUpdate frequency

Smart Slide Rule ships an update every 2 months, No DoomScrolling weekly. The most recent releases landed on November 1, 2026 and October 30, 2026 respectively.

Scorecard4 real differences · 6 level
Smart Slide Rule versus No DoomScrolling: the parameters behind the verdict, then further details
ParameterSmart Slide RuleNo DoomScrolling
Price$0.99Free — better
Rating5.0 (1 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings1 — better—
Update frequencyEvery 2 monthsWeekly — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationPaid—
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS11.0 — better18.6
Further details — not scored
Size4 MB10 MB
Age rating4+4+
DeveloperSohta ItohMaaDoTaa

In-app purchases

None

Smart Slide Rule

No in-app purchases

2 purchases

No DoomScrolling

Subscriptions2
  • Weekly Subscription3 Days trial$1.997 Days
  • Monthly Subscription3 Days trial$4.991 Month

Questions

Is Smart Slide Rule free?
Smart Slide Rule costs $0.99, with no in-app purchases.
Is No DoomScrolling free?
No DoomScrolling is free to download, with in-app purchases available.
Do Smart Slide Rule or No DoomScrolling have ads?
Neither Smart Slide Rule nor No DoomScrolling shows ads.
Which is updated more often, Smart Slide Rule or No DoomScrolling?
Smart Slide Rule ships an update every 2 months, and No DoomScrolling weekly. Most recently, Smart Slide Rule was updated on November 1, 2026 and No DoomScrolling on October 30, 2026.

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