Comparison

Ruler vs IoTシステム A・ISys

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

Head to head
About

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.

Highlights
  • 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
Features
Read full description

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.

About

IoTシステム A・ISys

Features
Read full description

産業設備向けIoTシステム「AIS」専用アプリ 以下のユニットを使用して監視、取得したデータを閲覧、通知の受信ができます。 【A・ISys接点監視用ユニット】  設備、装置の無電圧接点と接続して遠隔監視します。  ・運転信号:稼働状況をアプリから確認できます  ・警報信号:不具合をリアルタイムで通知します  ・カウント:接点の開閉をカウントし生産状況等を記録します 【A・ISys環境監視ユニット】  無線子機で計測した温度、湿度、CO2、気圧などをユニットで収集・送信し、アプリで閲覧できます。

Screenshots

Ruler4 screens
IoTシステム A・ISys4 screens

Verdict

The call

The clearest difference is in-app purchases: IoTシステム A・ISys at none against Ruler's 1. IoTシステム A・ISys also leads on ads (none vs shown). On price, update cadence, 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

Both are free to download. Ruler sells 1 one-off in-app purchase. IoTシステム A・ISys asks for nothing beyond the download.

UpkeepUpdate frequency

Ruler ships an update every 5 months, IoTシステム A・ISys every 7 months. The most recent releases landed on November 1, 2026 and November 3, 2026 respectively.

Scorecard2 real differences · 8 level
Ruler versus IoTシステム A・ISys: the parameters behind the verdict, then further details
ParameterRulerIoTシステム A・ISys
PriceFreeFree
Rating3.7 (3 ratings) — better—
Positive reviews63.0% of reviews—
Number of ratings3 — better—
Update frequencyEvery 5 months — betterEvery 7 months
AdsYesNo — better
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.0 — better15.6
Further details — not scored
Size4 MB53 MB
Age rating4+4+
Developermitsunori oishiACTN K.K.

In-app purchases

1 purchases

Ruler

One-time1
  • Hide Ads$0.99
None

IoTシステム A・ISys

No in-app purchases

Questions

Is Ruler free?
Ruler is free to download, with in-app purchases available.
Is IoTシステム A・ISys free?
IoTシステム A・ISys is free to download, with no in-app purchases.
Do Ruler or IoTシステム A・ISys have ads?
Ruler shows ads; IoTシステム A・ISys does not.
Which is updated more often, Ruler or IoTシステム A・ISys?
Ruler ships an update every 5 months, and IoTシステム A・ISys every 7 months. Most recently, Ruler was updated on November 1, 2026 and IoTシステム A・ISys on November 3, 2026.

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