Simple Xwind vs Spark Number
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Simple Xwind
Quickly calculate crosswind and tailwind limits during flight. This app provides fast, precise calculations without clutter or unnecessary graphics, designed for immediate use when conditions change unexpectedly.
- Quick crosswind calculations
- Precise tailwind limits
- Fast and reliable
- Simple, clutter-free interface
- Designed for speed
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You're on short final when the tower provides updated winds. The conditions have changed more than expected, and there’s no time for mental math to determine if you're within crosswind and tailwind limits. Xwind gives you quick and precise calculations when you need them most. No clutter, no unnecessary graphics—just a fast, reliable crosswind calculator built for ease of use. Unlike other bulky apps, Xwind is designed for speed and simplicity, so you can get the data you need instantly. No extra clicks, no distractions—just numbers.
Spark Number
Create personalized calculators for any task using simple text prompts. This app generates custom tools with native interfaces for mortgage calculations, recipes, discounts, and more, supporting advanced formulas and multiple languages.
- AI-powered calculator generation
- Custom formula support
- Native iOS interface
- Multi-language prompt support
- Plain text description input
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Spark Number: Define Your Custom Calculator with Creativity Can't find a calculator that perfectly fits your specific needs? Overwhelmed by complex spreadsheet formulas? Spark Number revolutionizes how you calculate by letting you become the creator! Spark Number is an innovative "dynamic calculator generator." Whether you need complex mortgage calculations, precise recipe ratios, or quick daily discount conversions, simply describe what you need in plain text (a prompt), and Spark Number will instantly generate a dedicated calculator with a beautiful, native interface. Core Features: AI-Powered Generation: Say goodbye to tedious manual setups. Describe your needs in a single sentence and get your custom calculator instantly. Powerful Custom Formulas: Supports basic arithmetic (+ - * /), advanced math functions (sin, cos, log), and logical conditions (IFS, min, max) to handle all your professional calculation needs. Native & Fluid Experience: Generated calculators are rendered using native iOS components, ensuring a buttery-smooth, stutter-free interactive experience. Multi-Language Support: Whatever language you use for your prompt, your generated calculator speaks it. Unleash your creativity! Use Spark Number to turn complex formulas into accessible, everyday tools right in your pocket.
Screenshots
Verdict
The clearest difference is in-app purchases: Simple Xwind at none against Spark Number's 4. On price, rating, ratings volume and ads 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. Spark Number sells 4 one-off in-app purchases. Simple Xwind asks for nothing beyond the download.
On the App Store both sit at effectively the same score — 5.0 for Simple Xwind against 5.0 for Spark Number. Both are backed by a comparable volume of ratings — 2 and 1 respectively.
| Parameter | Simple Xwind | Spark Number |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (2 ratings) | 5.0 (1 ratings) |
| Positive reviews | 66.7% of reviews | — |
| Number of ratings | 2 — better | 1 |
| Update frequency | — | Every 2 weeks |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.6 | 15.0 — better |
| Further details — not scored | ||
| Size | 1 MB | 4 MB |
| Age rating | 4+ | 4+ |
| Developer | Alex Deutz | Yellow Mountain Technology, Inc. |
In-app purchases
Simple Xwind
No in-app purchases
Spark Number
- Basic Pack 15 credits$0.99
- Unlock Unlimited Slots$4.99
- Value Pack 50 credits$4.99
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- Master Pack 150 credits$9.99









