Ruler vs Rubato
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Ruler
This app displays various measurement scales for length, including meters and inches. It allows users to set magnification ratios and reduced scales for different applications. Users can calibrate the ruler and adjust PPI settings for accurate measurements.
- Display various measurement scales
- Set magnification ratios
- Set reduced scales
- Measure in meters and inches
- Free mode for custom scales
- Calibration for accuracy
- PPI setting
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Scale Ruler is the simple application to display the scale of various measurement units. ※ Warning: - The accuracy of the scales cannot be guaranteed. - Calibration and PPI values will be reset when the model changes. - Set the PPI value only when the model is undecided. - When you change the PPI value, perform calibration after the change. ■How to use: ■Select mode In UNLOCKED state, after choosing measurement unit, magnification ratio and reduced scale, the scale is displayed. ■Free mode When dragging the screen at UNLOCK, you can set the scale in the range 1: 1 to 1: 100. When you press and hold the scale value, the keyboard is displayed and you can enter the scale. You can lock the scale on the ruler with a switch. Sorry for the advertisement during unlocking. After In-App Purchase, your ads will no longer be displayed. Specification of Scale Ruler - measure length meter,inches - magnification ratio 50% , 70.7% , 100% , 141% , 200% - reduced scale for meter 1:100 , 1:150 , 1:200 , 1:250 , 1:300 , 1:400 , 1:500 , 1:600 for inch 1:1 , 1:1.5 , 1:2 , 1:2.5 , 1:3 , 1:4 , 1:5 , 1:6 for inch(Architectural) 1:1 , 1:2 , 1:4 , 1:8 , 1:12 , 1:16 , 1:24 , 1:32 , 1:48 , 1:64 1:96 , 1:128 , 1:192 , 1:384 for inch(Engineering) 1:120 , 1:240 , 1:360 , 1:480 , 1:600 , 1:720 1:800 , 1:960 , 1:1080 ■ Settings - Calibration - PPI (pixels per inch) setting - In-app purchase (ads not displayed) - In-app purchase restoration ■ Calibration Adjust the length of the ruler. Use the correct ruler for adjustment. "Calibration" button: Records the adjusted state and reflects the calibration result on the ruler. "Reset" button: Returns the adjustment status to the specified value. It will not be recorded. "Initialize" button: Returns the adjustment status to the specified value and reflects it on the ruler. * Caution: The calibration value will be reset when the model changes. ■ PPI (pixels per inch) setting If the model is undecided, check the PPI value of the model before setting the PPI value. * Please set only when the model is undecided. "OK" button: Record the entered PPI value and reflect it on the ruler display. "Initialize" button: Returns the PPI value to the specified value and reflects it on the ruler. * Caution: The PPI value will be reset when the model changes.
Rubato
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Rubato is a daily planner that stacks your events vertically and lets you clear them from the top. Instead of pinning everything to a time, you stack them in order. • A plan that flows Stack what you want to do and it lines up from the top. Run late and everything after shifts; finish early and it moves up. You always see the whole day. Meetings and appointments become "fixed-time" events, and flowing events split around them. • Stack and clear Tap a frequent event in the History palette to stack it, or drag it into place. Complete it and it bursts away; the next one becomes current. Completion sounds and haptics are designed in-house. • Usual Rubato predicts what usually comes next, based on the time of day, the weekday, and what came before, and puts it first in the palette. It gets smarter as you use it. • Your day ends when you sleep Past midnight, the timeline keeps counting: 25:00, 26:00. Night owls' days stay in one piece. • Live mode The current time stays near the top, with only the current event and the next one shown large. Insert a break or a gap with one tap. Notifications arrive when an event starts, 10 minutes before a fixed-time event, and at the planned end. • Works with your calendar Events from your iPhone calendars (including Google) appear in the header; tap one to place it at a fixed time. Mark an event "Show in Calendar" and it's written to the calendar you choose, follows the flow as it moves, and settles into the actual time when completed. Subscribe to calendars by URL (iCal). • All-day events and to-dos Add all-day events and undated to-dos to any day. Tap a to-do to finish it; unfinished ones carry over to tomorrow. Place them on future days from the month view. • iPhone and Mac On Mac, Rubato lives in the menu bar and can be pinned as a standalone panel. It syncs through iCloud. There's no server: your data stays in your own iCloud. • Pricing Free to download. Try every feature free for 14 days (started by a ¥0 in-app purchase; it isn't a subscription and you'll never be charged automatically). To keep going, a single one-time purchase (¥2,200 in Japan; local price shown in the app) unlocks Rubato on both iPhone and Mac, forever. After the trial, viewing, completing, and syncing keep working.
Screenshots
Verdict
The clearest difference is ads: Rubato at none against Ruler's shown. Rubato also leads on update cadence (every 2 days vs every 5 months). Ruler's advantage is iOS requirement (15.0 vs 26.5). On price, 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. Ruler sells 1 one-off in-app purchase and Rubato sells 2 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.
Ruler ships an update every 5 months, Rubato every 2 days. The most recent releases landed on October 13, 2026 and October 6, 2026 respectively.
| Parameter | Ruler | Rubato |
|---|---|---|
| Price | Free | Free |
| Rating | 3.7 (3 ratings) — better | — |
| Positive reviews | 63.0% of reviews | — |
| Number of ratings | 3 — better | — |
| Update frequency | Every 5 months | Every 2 days — better |
| Ads | Yes | No — better |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Requires iOS | 15.0 — better | 26.5 |
| Further details — not scored | ||
| Size | 4 MB | 10 MB |
| Age rating | 4+ | 4+ |
| Developer | mitsunori oishi | Yujiro Yonetsu |
In-app purchases
Ruler
- Hide Ads$0.99
Rubato
- 14-Day TrialFree
- Rubato (One-Time Purchase)$12.99









