Y+ Calculator vs MultiiCalc
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Y+ Calculator
This app calculates the necessary grid spacing for computational fluid dynamics (CFD) simulations. It helps engineers determine near-wall cell height for accurate viscous flow computations. Supports both SI and Imperial units.
- Calculate grid spacing for target y+ values
- Supports viscous CFD computations
- Works in SI or Imperial units
- Resets to sea-level conditions
- Based on established fluid mechanics theory
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Y+ Calculator is a handy tool for calculating the grid spacing at a wall to achieve a target y+ value for viscous computational fluid dynamics (CFD) computations. Simply specify the flow conditions, the desired y+ value, and compute your grid spacing. If you are an engineer running viscous CFD computations, achieving a target value for y+ in your grid is essential for both resolved and wall function grids for accurate results. Save time by computing your near-wall cell height for the boundary layer before generating your grid. The Y+ Calculator works in either SI or Imperial units and quickly resets to sea-level conditions. This utility is brought to you by Cadence Design Systems. Note: Computations are based on flat-plate boundary layer theory from Frank M. White’s Fluid Mechanics 5th edition, page 467.
MultiiCalc
Save and reuse your important calculations. This tool lets you store named values to easily perform complex financial or cost analyses without losing track of intermediate steps. Share your results with others or export them to different applications.
- Save notable calculations by name
- Calculate against saved list items
- Track complex financial analyses
- Share calculations with friends
- Export calculations to other apps
- No analytics or tracking
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MultiiCalc allows you to keep your notable calculations saved to a list by name so that you can calculate other values against those list items later. Imagine you want to calculate the potential profit of a real estate investment, or the cost of a new home, perhaps the cost of a vacation. There are so many different fees and percentages that will need to be calculated that a simple calculator app will not be able to handle in one go. With MultiiCalc, you can save your values along the way and come back later - or just save and keep calculating so you don't lose track. You can even share your calculations with your friends or other apps! All of your data is YOUR data. I don't have any analytics or tracking in here, enjoy!
Screenshots
Verdict
The clearest difference is review sentiment: MultiiCalc at 50% against Y+ Calculator's 0%. MultiiCalc also leads on rating (5.0 vs 3.0) and update cadence (monthly vs every 8 months). Y+ Calculator's advantage is in-app purchases (none vs 3) and iOS requirement (9.0 vs 14.0). On price, ads 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. MultiiCalc sells 3 one-off in-app purchases. Y+ Calculator asks for nothing beyond the download.
MultiiCalc holds the better App Store score, 5.0 against 3.0. That said, the two scores are not equally well evidenced: MultiiCalc has 9 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 0% of Y+ Calculator's written reviews are positive against 50% of MultiiCalc's.
Y+ Calculator ships an update every 8 months, MultiiCalc monthly. The most recent releases landed on October 21, 2026 and October 3, 2026 respectively.
| Parameter | Y+ Calculator | MultiiCalc |
|---|---|---|
| Price | Free | Free |
| Rating | 3.0 (1 ratings) | 5.0 (9 ratings) — better |
| Positive reviews | 0.0% of reviews | 50.0% of reviews — better |
| Number of ratings | 1 | 9 — better |
| Update frequency | Every 8 months | Monthly — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 9.0 — better | 14.0 |
| Further details — not scored | ||
| Size | 18 MB | 5 MB |
| Age rating | 4+ | 4+ |
| Developer | Cadence Design Systems, Inc. | Christina Schell |
Customer experience
Y+ Calculator
MultiiCalc
In-app purchases
Y+ Calculator
No in-app purchases
MultiiCalc
- A Generous Tip$1.99
- A Hefty Tip$3.99
- A Lavish Tip$6.99
