Comparison

Screen Ruler vs TwoDo

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

Head to head
About

Screen Ruler

Turn your iPhone or iPad into a precise measuring tool. Easily measure lengths in centimeters or inches with features like magnifier mode and haptic feedback. Ideal for daily tasks, office use, DIY projects, and on-the-go measurements.

Highlights
  • Dual units (cm/inches)
  • Precision calibration
  • Magnifier mode
  • Haptic feedback
  • Clean interface
  • Save and label measurements
Features
Read full description

Turn your iPhone or iPad into a calibratable digital ruler for measuring small objects directly on the screen. Screen Ruler supports centimeters and inches, magnifier-assisted alignment, and haptic feedback. Measure Small Objects on Your Screen Use Screen Ruler for stationery, frames, craft materials, and other small objects that fit along your device screen. Place the object directly on the screen, move the measurement marks to its edges, and read the length. Core Features • Calibratable ruler: Match the scale to an object of known length and save calibration for your device. • CM and inch scales: Switch between centimeters and inches for everyday measurements. • Magnifier assist: Align measurement marks with object edges more confidently. • Haptic feedback: Feel subtle feedback while adjusting the marks. How to Get More Reliable Results For best results, place the object directly on the screen and check the scale against a known length. Calibrate the ruler if you notice an offset. Accuracy and Limitations Screen Ruler is designed for short, everyday measurements. Accuracy depends on device calibration, screen placement, and how precisely the marks are aligned. It does not use the camera or AR and is not intended for measuring rooms or large objects. Feedback: ankek1er@gmail.com

About

TwoDo

This utility app helps couples and partners manage shared tasks like shopping lists, places to visit, and to-dos. It features real-time synchronization between devices, ensuring both partners are always updated on additions and deletions. Say goodbye to forgotten items and missed opportunities with this simple, intuitive tool.

Highlights
  • Shared task management for couples
  • Real-time synchronization
  • Simple and intuitive UI
  • Manages shopping, places, and to-dos
  • Eliminates forgotten tasks
Features
Read full description

TwoDoは夫婦や恋人のためのToDoアプリです。 買うもの、行くとこ、すること、の3つを シンプルなUIで管理します。 相手がタスクを追加・削除すると すぐに自分のiPhoneにもリアルタイムに同期されます。 行こう行こうと思ってずっと行けていない場所、 買い物に行ったのに買い忘れて帰ってくる経験、 やろうと思ってるままやらず終いになっていること、 そんな全てとおさらばです。 TwoDo is a to-do app for couples and lovers. It manages three things: what to buy, where to go, and what to do, with a simple UI. If your partner adds or deletes a task, it will be synced to your iPhone soon. You can say goodbye to the places you've been meaning to go but haven't, the shopping you've gone to but forgot to buy, and the things you've been meaning to do but haven't done yet.

Screenshots

Screen Ruler1 screens
TwoDo3 screens

Verdict

The call

The clearest difference is review sentiment: TwoDo at 100% against Screen Ruler's 55%. TwoDo also leads on in-app purchases (none vs 2) and ads (none vs shown). Screen Ruler's advantage is price (Free vs $0.99). On device support and iOS requirement 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

Screen Ruler is free to download; TwoDo costs $0.99 up front. Screen Ruler sells 2 one-off in-app purchases. TwoDo asks for nothing beyond the download.

UpkeepUpdate frequency

Screen Ruler ships an update every 3 months, TwoDo every 2 days. The most recent releases landed on September 20, 2026 and September 21, 2026 respectively.

Scorecard6 real differences · 4 level
Screen Ruler versus TwoDo: the parameters behind the verdict, then further details
ParameterScreen RulerTwoDo
PriceFree — better$0.99
Rating3.7 (24 ratings) — better—
Positive reviews54.8% of reviews100.0% of reviews — better
Number of ratings24 — better—
Update frequencyEvery 3 monthsEvery 2 days — better
AdsYesNo — better
In-app purchasesYesNo — better
MonetizationFree with in-app purchases — betterPaid
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS13.0 — better14.0
Further details — not scored
Size19 MB26 MB
Age rating+44+
Developer向阳 杨Ryo Makishima

Customer experience

Screen Ruler

All ratings24 ratings
Positive66.7%
Neutral0.0%
Negative33.3%
Written reviews31 reviews
Positive54.8%
Neutral6.5%
Negative38.7%

TwoDo

Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

2 purchases

Screen Ruler

One-time2
  • Ads-free experience$1.99
  • Support for a cup of coffee$2.99
None

TwoDo

No in-app purchases

Questions

Is Screen Ruler free?
Screen Ruler is free to download, with in-app purchases available.
Is TwoDo free?
TwoDo costs $0.99, with no in-app purchases.
Do Screen Ruler or TwoDo have ads?
Screen Ruler shows ads; TwoDo does not.
Which is updated more often, Screen Ruler or TwoDo?
Screen Ruler ships an update every 3 months, and TwoDo every 2 days. Most recently, Screen Ruler was updated on September 20, 2026 and TwoDo on September 21, 2026.

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