CalcTooi vs Architects Ruler
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
CalcTooi
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CalcTooi is an exquisitely designed app that combines "classic style", "easy to use" and "fun". Guided by "less but better", it caters to daily math and basic calculation needs. In addition, the ability to save numbers as retro stickers lets you explore the fun of digital games like Beghilosz and more. Tags: Free | No ads | Optimized for iPhone | Pocket Calculator | Math Tool | Arithmetic Toy @ Better Design % • Classic Design: Inspired by the iconic Pocket ET66 handheld calculator, combining a retro aesthetic with modern simplicity. • Retro Theme: A fresh take on 80s nostalgia with dual dark and light themes that adapt seamlessly to your system settings. • Intuitive Use: Tailored for iPhone: lightweight, intuitive, offline-ready, and offering a smooth, native-like experience. ... @ Useful Tool % • Basic Calculation: Ready to use anytime, supports long-form, percentage conversions, positive/negative number and backspace for correction. • Save Calculations: Long press the screen to capture input formulas or results, with the option to save directly to your photo album. ... @ Fun Gameplay % • Number Games: Explore various calculator spelling or arithmetic games, experience retro culture or enjoy the moment of interaction with family and friends • Make Stickers: Enter secret codes, long press the screen to preview or flip designs, and create personalized stickers with one tap. ... Why choose CalcTooi ? Whether you’re seeking a modern digital replacement for retro electronics, a minimalist daily calculator, or an entertaining and educational math gadget, CalcTooi is worth a try. It might just become your go-to tool, silently serving your needs day after day. CalcTooi is free to download now—get started and explore it today! ：）
Architects Ruler
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Architects Ruler is made by architects for architects. And designers. Simple and convenient, a quick tool to get grip on all dimensions on any scale.
Screenshots
Verdict
The clearest difference is update cadence: Architects Ruler at every 3 months against CalcTooi's every 11 months. CalcTooi's advantage is iOS requirement (17.0 vs 26.0). On price, ads, in-app purchases 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
Both are free to download. CalcTooi sells 1 one-off in-app purchase and Architects Ruler sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.
CalcTooi ships an update every 11 months, Architects Ruler every 3 months. Both last shipped on October 24, 2026.
| Parameter | CalcTooi | Architects Ruler |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 11 months | Every 3 months — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Devices | iPhone | iPhone |
| Requires iOS | 17.0 — better | 26.0 |
| Further details — not scored | ||
| Size | 6 MB | 4 MB |
| Age rating | 4+ | 4+ |
| Developer | S.H.Y Art&Tech Office | Gijs Raggers |
In-app purchases
CalcTooi
- Buy a Coffee$3.00
Architects Ruler
- Lifetime scales menu$0.99
Questions
Is CalcTooi free?
Is Architects Ruler free?
Do CalcTooi or Architects Ruler have ads?
Which is updated more often, CalcTooi or Architects Ruler?
Other comparisons
