World Time Check vs RLM
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
World Time Check
Easily view and compare current times across multiple global cities simultaneously. This utility helps you coordinate international meetings or plan travel by showing time differences with intuitive scrolling and real-time synchronization.
- Multiple cities at once
- Real-time sync
- Check future times
- Easy city search
- Custom date & time
- Daylight saving support
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View times from cities around the world in a single list and check time differences with intuitive scrolling. Perfect for coordinating international meetings or planning trips abroad. See the flow of time across multiple cities simultaneously. 【Key Features】 ◆ Multiple Cities at Once No limit on cities you can add. View them all with horizontal scrolling. ◆ Real-Time Sync Auto-scroll to current time when real-time mode is enabled. ◆ Check Future Times Scroll vertically to see upcoming times for each region. ◆ Easy City Search Search by city name or quickly select from your history. ◆ Custom Date & Time Set a specific date and time to see corresponding times in all regions. ◆ Daylight Saving Support DST periods are visually highlighted in pink.
RLM
This scientific calculator offers a comprehensive suite of tools for finance, business, statistics, and complex scientific calculations. It emulates a classic calculator while leveraging modern iOS device capabilities for ease of use and advanced functions.
- Finance and Business calculations
- Date and Time interval calculations
- Advanced Statistics and Curve Fitting
- Complex Numbers and 3D Vectors
- Unit and Currency Conversions
- Equation Solver
- Programmable functions
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The RLM-10CX application is a general purpose calculator with a special focus in science and engineering. It is based in the Hewlett-Packard HP-10C calculator, but specially designed to bring up the most of your iOS devices and , at the same time, conserving the easy of use and all functions originally provided by the real calculator. >Finance Menu: •Account Balance: Credit line type account based on cash transactions and interest rates applied. •Amortization: Loan Amortization Schedule for a single loan payment or from several payments at once. •Bond Price & Yield: Bonds calculations in an easy way with all options and values at sight. •Black-Scholes Options: CALL, PUT and “Greeks” calculations of the Black-Scholes European option valuation model. •Equal Periods: Calculations with Cash Flows occurring at regular time intervals. •Unequal Periods: Calculations with Cash Flows occurring at arbitrary dates. •Depreciation: Calculates depreciation with SL, SOYD, DB or MACRS methods and conventions. values at sight. •Interest Conversion: Nominal and effective interest conversion. •Time Value of Money: Compound Interest problems involving money earning interest over a period of time. >Business Menu: •Bill-Tip-Split: Calculates the sharing of a Bill with Tip. •Break-Even: Analyze the following relation: Profit = (Price - Var.Cost) • Units - Fix.Cost •Currency Exchange with on-line rates. •Percents & Margins: Calculates %Change, %Total and Business margins. Date / Time Menu: Calculates Date and Time intervals with all values at sight. >Statistics Menu: •One-Variable Statistics: Calculations for one variable data samples. •Two-Variable Statistics: Calculations for two variables data samples. •Curve Fitting: 6 Regression models to fit a curve based on two variables data samples. •Probability: Combinations, permutations, Normal, Exponential, t-Student and Weibull probability distributions. >Scientific Menu: •Complex Numbers: Operations and functions with complex numbers. •Logarithms, Trigonometric, Hyperbolic and Number Alteration functions. •Triangle Solution: Solves a Plane & Spherical triangles. •3D Vectors: Operations and functions with vectors in Cartesian, Spherical or Cylindrical coordinates. •Universal Constants: All the NIST-CODATA physical constants values and descriptions. •Units Conversion: Physical units conversion completely customizable. >Convert Menu: •Angles & Polar: Convert angles between DEG,RAD,GRAD,DMS or Slope % & Polar-Rectangular coordinates. •Currencies: world currencies conversions with manual input or on-line current rates. •Interest Rates: Nominal and effective interest conversion. •Units: Physical units conversions. >Program Menu: Create, edit or load previously saved programs. >Solver Menu: Solve arbitrary algebraic equations entered and saved in the equation editor and creates a menu with all the variables to solve any of them. >Utilities Menu: •General Settings: Customize the calculator to your preference. •Storage Registers: Store and perform operations directly over the calculator’s storage registers. •Memory Content: Shows all memory content edit, backup or restore. •Help Documents: learn by example about all menus. >Editors: submenu to select data editors. System requirements: iOS 15.0 or above. 30 days Free-Trial. In-App-Purchase: One-Payment for life. License Agreement: http://www.apple.com/legal/itunes/appstore/dev/stdeula Disclaimer: THIS IS NOT A HEWLETT PACKARD CALCULATOR, AND IS NOT SPONSORED IN ANYWAY BY HEWLETT PACKARD OR ANY OF ITS SUBSIDIARIES.
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Verdict
The clearest difference is price: RLM at Free against World Time Check's $0.99. RLM also leads on rating (5.0 vs 1.0) and update cadence (every 4 weeks vs every 5 months). World Time Check's advantage is in-app purchases (none vs 1). On ratings volume, ads, 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
RLM is free to download; World Time Check costs $0.99 up front. RLM sells 1 one-off in-app purchase. World Time Check asks for nothing beyond the download.
RLM holds the better App Store score, 5.0 against 1.0. Both are backed by a comparable volume of ratings — 1 and 1 respectively.
World Time Check ships an update every 5 months, RLM every 4 weeks. The most recent releases landed on October 11, 2026 and September 30, 2026 respectively.
| Parameter | World Time Check | RLM |
|---|---|---|
| Price | $0.99 | Free — better |
| Rating | 1.0 (1 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 14.3% of reviews | — |
| Number of ratings | 1 | 1 |
| Update frequency | Every 5 months | Every 4 weeks — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Paid | Free — better |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.5 | 15.0 — better |
| Further details — not scored | ||
| Size | 1 MB | 6 MB |
| Age rating | 4+ | 4+ |
| Developer | SHUJI FUKUNAGA | R.L.M. Software |
Customer experience
World Time Check
RLM
In-app purchases
World Time Check
No in-app purchases
RLM
- Lifetime Purchase$9.99









