Ruler vs Convay Chat
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
Read full descriptionHide 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.
Convay Chat
Read full descriptionHide full description
Convay Chat – Secure Team Messaging for Modern Workplaces Convay Chat is a secure and efficient messaging app designed for teams, public institutions, and enterprises that require reliable communication. Built with productivity and data privacy in mind, it supports cross-department collaboration and enables smooth coordination across distributed teams. Whether you're part of a government agency, managing large-scale projects, or working remotely with your team — Convay Chat simplifies internal communication while adhering to organizational security standards. Core Features: • 1:1 and Group Messaging Communicate privately or create group chats organized by department, project, or topic. • Secure File Sharing Easily exchange documents, images, and links within the chat environment. • Customizable Notifications Stay informed without distraction using personalized alert settings. • End-to-End Encryption Conversations are encrypted using industry-standard protocols to ensure privacy and data protection. • Multilingual Interface Supports multiple languages to facilitate collaboration across diverse teams. • Message History & Cloud Storage Access chat history, shared files, and pinned messages anytime, from any device. • Role-Based Access Controls Manage users and permissions with administrative tools designed for organizational use. • Status & Presence Indicators See availability status and schedule messages for better team coordination. • Cross-Device Sync Switch between devices without losing your place — everything stays updated in real time. • Flexible Hosting Options Choose between cloud-based or on-premise deployment, aligned with local compliance and data sovereignty requirements. Built for Organizations That Require Security and Control Convay Chat is purpose-built for: • Government departments • Public sector teams • Large enterprises • Remote and hybrid teams • Educational institutions • Nonprofits and civic organizations It helps streamline workflows, support secure internal communication, and maintain compliance across sectors. Part of the Convay Collaboration Suite Convay Chat integrates with the broader Convay platform, offering tools for meetings, task management, and secure collaboration — all designed for modern, security-conscious organizations. Getting Started Convay Chat delivers a secure, efficient, and organized communication experience across devices. Designed to support professional collaboration at scale, it fits seamlessly into your existing workflow. Download Convay Chat and enhance how your team connects and collaborates.
Screenshots
Verdict
The clearest difference is in-app purchases: Convay Chat at none against Ruler's 1. Convay Chat also leads on ads (none vs shown) and update cadence (every 6 weeks vs every 5 months). Ruler's advantage is iOS requirement (15.0 vs 18.5). On price 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. Convay Chat asks for nothing beyond the download.
Ruler ships an update every 5 months, Convay Chat every 6 weeks. The most recent releases landed on October 13, 2026 and September 28, 2026 respectively.
| Parameter | Ruler | Convay Chat |
|---|---|---|
| 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 6 weeks — better |
| Ads | Yes | No — better |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 15.0 — better | 18.5 |
| Further details — not scored | ||
| Size | 4 MB | 227 MB |
| Age rating | 4+ | 4+ |
| Developer | mitsunori oishi | Synesis IT Ltd. |
In-app purchases
Ruler
- Hide Ads$0.99
Convay Chat
No in-app purchases









