Comparison

Calculator SC vs Operations Diary

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

Head to head
About

Calculator SC

This app provides a multi-functional calculator with a familiar interface. It includes scientific, unit conversion, and logic calculation modes, along with extensive mathematical functions and constants. Calculations can be shared across modes, and it supports copy-paste functionality.

Highlights
  • Scientific calculator mode
  • Unit converter and calculator
  • Logic calculator (n-base conversion)
  • Algebraic logic and calculation priority
  • Variables and memories
  • Complex number calculations
  • Unit and currency converter
Features
Read full description

The SC-323PU is a multi functional calculator. It is designed in a way, that it simulates the visual and operational aspects of a true pocket calculator, such that the user will be immediately familiar with its interface. A complete operation manual is included within the App. The SC-323PU offers the following calculator modes for different tasks: - SCIENTIFIC CALCULATOR - UNIT CONVERTER and UNIT CALCULATOR - LOGIC CALCULATOR (n-base conversion) • Full operating instructions are included in the App (visible when device is in landscape orientation). • All modes share the same memory contents, and calculation value, so that the different calculator modes can be used in one calculation task. • Pasteboard support (copy and paste) • Algebraic logic for calculation entry. • Priority of calculations according to a given mathematical formula. • 30 levels of parentheses or pending operations. • Variables and memories to store values and use in calculations. • Floating decimal point calculations with 20 digits mantissa and 2 digits exponent. • Calculations: Four arithmetic calculations, constant calculation, memory calculations, trigonometric and inverse trigonometric functions, hyperbolic and inverse hyperbolic functions, conversion of angles and time, reciprocals, square roots and cubic roots, X-th roots of Y, squares and powers, logarithmic and exponential functions, factorials, permutations, combinations, conversions of coordinates. • AER (Algebraic Expression Reserve) for repetitive calculations of expressions and formulas. • Complex number calculations. • Different display modes selectable: floating point decimal, fixed point decimal, scientific notation and engineering notation. • DEG/RAD/GRAD selector key. • Fraction calculations. • Time calculations. • Frame rate calculations. • 47 physical constants. • Unit converter and currency converter. • Calculations with mixed units. • The calculator is shipped with 84 physical units and 16 SI prefixes predefined. • Exchange rate of currency units will be updated automatically from internet. • Additional units can be defined by user. • Single and two lines view modes optimized for different conversion tasks. • Conversions between 4 base systems HEX, DEC, OCT, BIN. • Boolean operations AND, OR, XOR, NOT, bit shift operations. • Conversion from “little endian” to “big endian” format and vice versa. • Handling of 8, 16, 32 and 64 bit signed and unsigned numbers including overflow calculations. Also on your Apple Watch! You can do basic calculations, tip calculations, unit and currency conversions and even scientific calculations directly on your wrist. Designed with large keys for best usability on the small screen.

About

Operations Diary

Features
Read full description

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

Calculator SC4 screens
Operations Diary4 screens

Verdict

The call

The clearest difference is update cadence: Operations Diary at weekly against Calculator SC's every 5 months. Operations Diary also leads on price ($0.99 vs $3.99). Calculator SC's advantage is device support (5 vs 3) and iOS requirement (12.0 vs 15.5). On ads and in-app purchases 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

Calculator SC costs $3.99 and Operations Diary $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Calculator SC ships an update every 5 months, Operations Diary weekly. The most recent releases landed on October 29, 2026 and October 28, 2026 respectively.

Scorecard4 real differences · 6 level
Calculator SC versus Operations Diary: the parameters behind the verdict, then further details
ParameterCalculator SCOperations Diary
Price$3.99$0.99 — better
Rating4.7 (118 ratings) — better—
Positive reviews83.0% of reviews—
Number of ratings118 — better—
Update frequencyEvery 5 monthsWeekly — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaid—
DevicesiPhone, iPad, iPod, Mac, Apple Watch — betteriPhone, iPad, iPod
Requires iOS12.0 — better15.5
Further details — not scored
Size15 MB33 MB
Age rating4+17+
DeveloperThomas ÖllingerLars Schaefer-Dryden

Bugs and requests

Calculator SC

Reported bugs

12 issues
  • Deg/Rad mode switching bug with inverse tangent function
  • Rounding error when using fractions
  • Incorrectly calculates negative numbers squared
  • Watch app not working
  • App opens not working after update
Show 7 more
  • Sine function shows wrong sign for certain negative degrees
  • Display pushed out of view on iPad
  • App freezes or becomes unusable after switching between portrait and landscape
  • Incorrect calculation for fractions (-1/2 - 1/3)
  • Stopped working after a week
  • DAL calculator doesn't have a backspace
  • Software not very responsive

Requested features

16 requests
  • Ability to change ordering of fundamental constants
  • Display expressions in scientific mode
  • Larger font size for expressions in DAL
  • Option to revert to older UI design
  • Quadratic equation solver mode
Show 11 more
  • Customization of display font size and colors
  • Graphing functionality
  • Ability to change the design/layout
  • Copy and paste functionality
  • Key click feedback
  • More programming functions (rotate, ASCII, bit mask builder)
  • Time/frequency specific conversions, memory, etc.
  • Translate help and settings to French
  • iPad compatibility improvements
  • Backspace in DAL mode
  • Sound feedback for key presses

Operations Diary

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Calculator SC

No in-app purchases

None

Operations Diary

No in-app purchases

Questions

Is Calculator SC free?
Calculator SC costs $3.99, with no in-app purchases.
Is Operations Diary free?
Operations Diary costs $0.99, with no in-app purchases.
Do Calculator SC or Operations Diary have ads?
Neither Calculator SC nor Operations Diary shows ads.
Which is updated more often, Calculator SC or Operations Diary?
Calculator SC ships an update every 5 months, and Operations Diary weekly. Most recently, Calculator SC was updated on October 29, 2026 and Operations Diary on October 28, 2026.

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