Ratio Calculator vs Operations Diary
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Ratio Calculator
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Ratio & Proportion Calculator is your complete math utility for solving ratios, proportions, percentages, scale calculations, direct and inverse proportion problems, mixing ratios, construction ratios, and much more. Whether you are a student, teacher, engineer, contractor, accountant, or business owner, this app helps you solve ratio problems quickly and accurately without manual calculations. No more confusion with cross multiplication, percentage conversions, recipe scaling, construction mix ratios, or financial proportions. Get instant results with step-by-step solutions and save time every day. MAIN FEATURES: • Simple Ratio Calculator Calculate and simplify ratios instantly • Proportion Solver Find missing values using cross multiplication • Direct Proportion Calculator Perfect for work, speed, and quantity calculations • Inverse Proportion Calculator Useful for workers, time, and speed problems • Scale Ratio Calculator Ideal for maps, architecture, and engineering drawings • Mixing Ratio Calculator Concrete mix, paint mix, fuel mix, recipes, and more • Percentage Ratio Calculator Convert ratio to percentage and percentage to ratio • Golden Ratio Calculator Useful for design, architecture, and visual balance • Aspect Ratio Calculator Screen size, image dimensions, and video ratios • Financial Ratio Calculator Profit sharing, investment division, and expense ratio • Construction Ratio Calculator Cement, sand, aggregate, and material distribution • Recipe Ratio Calculator Scale ingredients for cooking and food preparation Perfect for education, business, construction, engineering, finance, and daily life calculations. Download Ratio & Proportion Calculator now and solve every ratio problem easily.
Operations Diary
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The digital operations diary for missions and drills in civil protection. Create and manage operations diaries right on your smartphone — fully offline and without registration. MISSION WIZARD Create new missions in seconds. The guided wizard captures all relevant data — from mission type and requester to command post and alarm time — and automatically generates the first log entries. Duplicate existing missions with a single tap. COMPLETE DOCUMENTATION Record events chronologically with automatic date-time group (DTG). Use categorized quick actions for common entries — from strength and radio reports to GPS/weather data and handovers. Create custom quick actions and share them via QR code. DIGITAL SIGNATURES & HANDOVERS Sign mission closures and diary handovers digitally. Both leaders sign during handover — signatures appear correctly assigned in the PDF export. Optionally transfer the mission directly to the new leader's device. SITUATION REPORTS & MISSION REPORTS Create structured situation reports with auto-fill from mission data and export them as PDF in official form style. Mission reports summarize operations with a milestone timeline and statistics. UNIT REGISTRATION Register deployed units with personnel, vehicles, and strength. Registration forms are automatically saved as PDF attachments to log entries. Templates for recurring units speed up registration — shareable via QR code. STRENGTH REPORTS Report personnel strength with leaders, sub-leaders, and crew. The dashboard shows total strength from reports or active units. PHOTO DOCUMENTATION Attach photos directly from the camera or gallery to log entries. Compression is adjustable, images appear as attachments in the PDF export. DASHBOARD & SEARCH The interactive dashboard shows mission strength, location, and a dynamic milestone timeline. Search and filter chips on the home screen help find missions quickly. PDF EXPORT Export the complete operations diary as a print-ready A4 PDF — with digital signatures, handover protocols, and photo attachments. The correct signature appears automatically based on handover timing. MORE FEATURES • Guided onboarding with permissions and profile setup • Night mode (red light) for night operations • Export, import, and transfer missions between devices • Backup & restore all data as .etb file • Fully offline — all data stays on your device • German and English
Screenshots
Verdict
The clearest difference is update cadence: Operations Diary at weekly against Ratio Calculator's every 35 months. Operations Diary also leads on price ($0.99 vs $4.99). Ratio Calculator's advantage is iOS requirement (12.0 vs 15.5). On 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
Ratio Calculator costs $4.99 and Operations Diary $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Ratio Calculator ships an update every 35 months, Operations Diary weekly. The most recent releases landed on November 3, 2026 and November 13, 2026 respectively.
| Parameter | Ratio Calculator | Operations Diary |
|---|---|---|
| Price | $4.99 | $0.99 — better |
| Update frequency | Every 35 months | Weekly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 12.0 — better | 15.5 |
| Further details — not scored | ||
| Size | 28 MB | 34 MB |
| Age rating | 4+ | 17+ |
| Developer | Bhavinkumar Satashiya | Lars Schaefer-Dryden |
In-app purchases
Ratio Calculator
No in-app purchases
Operations Diary
No in-app purchases
Questions
Is Ratio Calculator free?
Is Operations Diary free?
Do Ratio Calculator or Operations Diary have ads?
Which is updated more often, Ratio Calculator or Operations Diary?
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