RLM vs Block It Out
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
RLM
This advanced scientific calculator emulates the functionality of the HP-15C, offering comprehensive tools for finance, business, statistics, and scientific calculations. It supports programming, equation solving, and unit conversions, optimized for iOS devices.
- Programmable advanced scientific calculator
- Finance and business calculation menus
- Statistics and probability functions
- Complex numbers and matrix operations
- Unit and currency conversions
- Equation solver and programming capabilities
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The RLM-15CX application is a programable advanced scientific calculator. It is based in the Hewlett-Packard HP-15C calculator, but specially designed to bring up the most of your iOS devices and , at the same time, conserving the easy of use and the functionality 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 Cash Flows: Solve problems where different cash flows occur at regular time intervals. •Unequal Periods Cash Flows: Solve problems where different cash flows occur at different dates. •Depreciation: Calculates depreciation with SL, SOYD, DB or MACRS methods and conventions. values at sight. •Interest Rates: 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. •Matrix: view, create or edit matrices with real or complex elements. •Plane Triangle: Solves a two dimensional triangle (ASA,SAS,SSA and SSS). •Spherical Triangle: Solves a triangle in a sphere’s surface (AAA,AAS,ASA,SAS,SSA and SSS). •Universal Constants: All the NIST-CODATA fundamental physical constants. •Vectors 3D: Operations and functions with vectors in Cartesian, Spherical or Cylindrical coordinates. >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. •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
Block It Out
This app automates calendar synchronization across multiple accounts, ensuring you're never double-booked. It protects your privacy by blocking busy times without revealing personal event details, all while operating seamlessly in the background.
- Automated event blocking
- Privacy protection for events
- Seamless background synchronization
- Customizable shadow event titles
- Flexible filtering options
- Support for recurring events
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Block It Out is the easiest way to make sure you're never double-booked again across multiple accounts. Automatically convey availability and protect your privacy with no manual effort. Block It Out uses intelligent event blocking and performs seamless synchronization behind the scenes. Best of all, it does this without talking to the cloud or any external services. Privacy-First Design • Block out busy time in work calendars without revealing personal event details • Create "shadow events" that show you're busy without exposing sensitive information • Customize shadow event titles to maintain professional boundaries Smart Sync Rules • Set up automated rules to sync between any calendar accounts • Choose source calendars and target destination calendars • Advanced filtering options to sync only specific events • Supports recurring events with full recurrence pattern preservation Flexible Filtering • Filter events by title, duration, or custom conditions • Advanced users get hierarchical AND/OR logic for complex rules • Create sophisticated event matching patterns Seamless Background Operation • Automatic background synchronization keeps calendars updated • Real-time notifications when sync operations complete • Works across all your calendar accounts (iCloud, Google, Exchange, etc.) Perfect for Work-Life Balance • Sync personal appointments to work calendar as "busy" blocks • Maintain calendar privacy while ensuring scheduling conflicts are avoided • Professional appearance with customizable shadow event templates Perfect for Work-Work Balance • Consultants: sync your availability across competing clients • Founders: maintain clear availability across your multiple ventures, or your day job and your side hustle • Executives: give your EA access to availability across external commitments without divulging sensitive information Subscription Tiers • Free: 1 sync rule to demonstrate basic functionality • Essential: Up to 2 rules, with privacy filtering and custom shadow titles • Advanced: Unlimited rules, multiple destinations, advanced conditions, rollback capabilities, and custom templates Advanced Features (Advanced Tier) • Multiple destination calendars per rule • Custom shadow event templates and reminders • Transaction rollback system for safe operations • Hierarchical rule logic with AND/OR groups • ...and more! Whether you're coordinating between personal and work calendars, managing multiple business accounts, or simply want to maintain privacy while staying organized, Block It Out provides the automation and control you've needed since the whole thing went digital. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy policy: https://block-it-out.com/privacy.html
Screenshots
Verdict
The clearest difference is rating: Block It Out at 5.0 against RLM's 4.1. Block It Out also leads on review sentiment (100% vs 80%) and update cadence (every 10 days vs monthly). RLM's advantage is ratings volume (17 vs 2). On price, ads, in-app purchases and monetization model 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. RLM sells 4 in-app purchases, starting at $0.49 per month and Block It Out sells 2 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.
Block It Out holds the better App Store score, 5.0 against 4.1. That said, the two scores are not equally well evidenced: RLM has 17 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 80% of RLM's written reviews are positive against 100% of Block It Out's.
RLM ships an update monthly, Block It Out every 10 days. The most recent releases landed on September 10, 2026 and September 19, 2026 respectively.
| Parameter | RLM | Block It Out |
|---|---|---|
| Price | Free | Free |
| Rating | 4.1 (17 ratings) | 5.0 (2 ratings) — better |
| Positive reviews | 80.0% of reviews | 100.0% of reviews — better |
| Number of ratings | 17 — better | 2 |
| Update frequency | Monthly | Every 10 days — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Freemium |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.0 — better | 15.5 |
| Further details — not scored | ||
| Size | 6 MB | 11 MB |
| Age rating | 4+ | 4+ |
| Developer | R.L.M. Software | Isaiah Weiner |
Customer experience
RLM
Block It Out
In-app purchases
RLM
- Monthly Subscription$0.491 Month
- Semi-Annual Subscription$2.996 Months
- Annual Subscription$5.991 Year
- One-Time Purchase$9.99
Block It Out
- Block It Out - Essential$4.991 Month
- Block It Out - Advanced$19.991 Month









