Comparison

Scale vs AI

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

Head to head
About

Scale

This tool simplifies scaling and unit conversions for creators. It offers a vast library of scales and units, allowing for seamless adjustments and precise calculations. Customize the interface to match your workflow and focus on your projects.

Highlights
  • Extensive database of scales and units
  • Customizable scales and units
  • Imperial and metric conversions
  • Fractional and decimal rounding
  • Conversion history
  • Customizable buttons
Features
Read full description

Build models and other scaled objects faster and more accurately with Scale-o-Tron. Model builders, architects, tabletop gamers, doll makers, train enthusiasts, sculptors, set designers, and anyone else who builds to scale can focus on their craft instead of on conversions. Features: • Convert from any scale and unit to any other scale and unit. You are not limited to converting from 1:1. • Mix scales and units in a calculation; Scale-o-Tron handles the conversions. • A large library of common scales, organized for quick access, plus your own custom scales. • Metric and imperial units, including historical units for old schematics and literature. • Fine control over numerical precision and display. Fraction rounding keeps imperial measurements practical. • Customize and save as many calculator layouts as you like, each suited to a type of project. • Adjust button and display size to your preference. Whether you build from scratch or from kits, Scale-o-Tron keeps your project accurate and lets you focus on the build. Visit the website to learn how Scale-o-Tron can help with your projects.

About

AI

This app leverages AI to transform simple memos into detailed, actionable ideas. It helps users expand creativity and explore new perspectives, ideal for those who need help concretizing or refining initial concepts.

Highlights
  • Quick memo function
  • AI-generated idea provision
  • Detailed idea expansion
  • Multiple idea perspectives
  • Idea saving and management
Features
Read full description

AI-dea is a cutting-edge app that uses the popular Chat AI to support your idea generation. By utilizing AI, it provides instant and detailed ideas from simple one-line memos, expanding your creativity and providing new perspectives. It's especially recommended for those who can think of simple ideas but struggle to concretize them or want to improve them from multiple perspectives. AI-dea's main features include: Quick and easy memo function: You can quickly jot down your ideas as soon as you open the app. AI-generated idea provision: Powerful AI algorithms, utilizing Chat AI, provide concrete and detailed ideas from your memo in an instant. This AI-generated idea provision is the latest method to support your idea generation. Provide various ideas to the AI, such as video topics, shop events, and new product ideas. Idea saving: Not only your memos, but also the AI-generated ideas are saved in the app. Provide many ideas to the AI, gain inspiration, and further improve your ideas.

Screenshots

Scale4 screens
AI4 screens

Verdict

The call

The clearest difference is price: AI at Free against Scale's $4.99. AI also leads on rating (5.0 vs 4.2) and device support (3 vs 1). Scale's advantage is ads (none vs shown) and update cadence (every 8 days vs every 5 months). On ratings volume 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

AI is free to download; Scale costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

AI holds the better App Store score, 5.0 against 4.2. Both are backed by a comparable volume of ratings — 5 and 6 respectively.

UpkeepUpdate frequency

Scale ships an update every 8 days, AI every 5 months. The most recent releases landed on November 2, 2026 and November 3, 2026 respectively.

Scorecard7 real differences · 3 level
Scale versus AI: the parameters behind the verdict, then further details
ParameterScaleAI
Price$4.99Free — better
Rating4.2 (5 ratings)5.0 (6 ratings) — better
Positive reviews66.7% of reviews—
Number of ratings56 — better
Update frequencyEvery 8 days — betterEvery 5 months
AdsNo — betterYes
In-app purchasesNoNo
MonetizationPaidAd-supported — better
DevicesiPhoneiPhone, iPad, iPod — better
Requires iOS17.015.6 — better
Further details — not scored
Size3 MB74 MB
Age rating4+12+
DeveloperMizmovac, Incyu nakamura

Customer experience

Scale

All ratings5 ratings
Positive80.0%
Neutral0.0%
Negative20.0%
Written reviews3 reviews
Positive66.7%
Neutral0.0%
Negative33.3%

AI

All ratings5 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Scale

No in-app purchases

None

AI

No in-app purchases

Questions

Is Scale free?
Scale costs $4.99, with no in-app purchases.
Is AI free?
AI is free to download, with no in-app purchases.
Which has better reviews, Scale or AI?
AI is rated higher. Scale averages 4.2 out of 5 from 5 ratings, while AI averages 5.0 from 6 ratings.
Do Scale or AI have ads?
AI shows ads; Scale does not.
Which is updated more often, Scale or AI?
Scale ships an update every 8 days, and AI every 5 months. Most recently, Scale was updated on November 2, 2026 and AI on November 3, 2026.

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