Empty Widget vs Spool Shelf
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Empty Widget
Personalize your home and lock screens with customizable widgets. Create invisible spacing, add transparent elements, or use text, emoji, and countdowns to express yourself. Supports multiple sizes and seamlessly blends with your wallpaper.
- Transparent and invisible widgets
- Custom colors and gradients
- Text, emoji, and symbol widgets
- Countdown and clock widgets
- Home and lock screen support
- Multiple widget sizes
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Blank Widget lets you customize your home screen and lock screen with invisible, transparent, and fully personalized widgets. Create clean spacing between your apps, add transparent widgets that blend seamlessly with your wallpaper, or express yourself with custom colors, gradients, text, emoji, symbols, and countdowns. • Transparent & invisible widgets • Custom colors and gradients • Text, emoji, and SF Symbol widgets • Countdown and clock widgets • Home screen & lock screen support • Multiple sizes: small, medium, and large Privacy Policy: https://www.koza.works/privacy-policy Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Spool Shelf
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Spool Shelf is a hobbyist’s ultimate 3D printing filament inventory management tool. Track inventory, orders, historical data, and more — all with just a tap! Spool Shelf makes the task of keeping inventory records up to date an absolute breeze! All of the most important information regarding your filament can be stored within Spool Shelf and is made easily accessible, so you can quickly find the exact filament you’re looking for — both in the app and in your workshop. Here are some of Spool Shelf’s key features: DASHBOARD • Get quick stats on the number of filaments in stock, out of stock, running low, and more. • View your total on-hand inventory value. • View inventory history ranging from the last 7 days to all time. • Product breakdown by material and manufacturer. • Get the total number of products, on-hand units, received orders, and more. INVENTORY • Track filament by the spool. • Assign a bin # to quickly locate a filament spool in your workshop. • Assign material and manufacturer to each filament for easier sorting. • Assign barcode and SKU. • View inventory history, including adjustment history per item. • Sort inventory by in stock, low stock, no stock, and more. ORDERS • Bulk-receive inventory items quickly and easily. • Assign supplier, shipping courier, tracking number, and order number for easier sorting. • Quickly duplicate an order for frequently purchased filaments. • Sort orders by pending, partially received, fully received, and cancelled. MORE • Powerful search allows you to quickly locate inventory items and orders by combining multiple queries into a single search. • Choose to be reminded when orders are expected to arrive, as well as when they are past due. • Sync inventory data automatically with iCloud, so it is accessible on multiple devices. FROM THE DEVELOPER Hey there! I designed Spool Shelf to make filament inventory management fun and intuitive, so 3D printing hobbyists (like me!) can easily manage their ever-growing filament stockpile. As a 3D printing hobbyist myself, I took great care when building Spool Shelf so that it works exactly as a hobbyist would expect. I am incredibly proud to share Spool Shelf with you, and I truly hope you enjoy using it as much as I enjoyed building it. If you love Spool Shelf, I’d love to hear about it! If you find a bug, have a feature request, or if something else is on your mind, I’d love to hear about that too! My goal is to make Spool Shelf the best it can be, and feedback like yours makes all the difference. You can reach out to me at hello@spoolshelf.app Happy printing!
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Verdict
The clearest difference is price: Empty Widget at Free against Spool Shelf's $6.99. Spool Shelf's advantage is in-app purchases (none vs 2). On 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
Empty Widget is free to download; Spool Shelf costs $6.99 up front. Empty Widget sells 2 in-app purchases, starting at $4.99 per 7 days. Spool Shelf asks for nothing beyond the download.
| Parameter | Empty Widget | Spool Shelf |
|---|---|---|
| Price | Free — better | $6.99 |
| Rating | 4.2 (13 ratings) — better | — |
| Positive reviews | 66.7% of reviews | — |
| Number of ratings | 13 — better | — |
| Update frequency | Every 3 days | — |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 17.0 | 17.0 |
| Further details — not scored | ||
| Size | 9 MB | 7 MB |
| Age rating | 4+ | 4+ |
| Developer | Dogancan Mavideniz | Daniel De Ciantis |
In-app purchases
Empty Widget
- Weekly Premium3 Days trial$4.997 Days
- Yearly Premium3 Days trial$29.991 Year
Spool Shelf
No in-app purchases









