AurumTools vs OTEC
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
AurumTools
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"Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/"AurumTool is the versatile app designed specifically for goldsmiths and jewelry manufacturers. It offers numerous practical features to simplify and streamline daily work. With AurumTool, you can compare ring sizes, calculate prices, and determine the optimal mixing ratios for alloys. Additionally, the app enables you to calculate the required material length for jewelry pieces, provides detailed specifications for diamonds, and supports real-time gold price calculations. AurumTool combines all these essential tools into a user-friendly application, making it the perfect digital companion for everyone in the jewelry industry. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula
OTEC
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Designed for professional metal polishing, OTEC gives you a smarter, faster and more precise way to manage your workflows. Key Features • Seamless Bluetooth connection to your EF-One or EF-Nova • Adjust processing parameters directly from the app • Save custom settings for consistent, repeatable results • Create and manage Recipes for specific workpieces, including time, speed & voltage • Improve efficiency with quick access to your preferred polishing processes With OTEC, you can bring precision, repeatability and maximum convenience to your surface-finishing operations—right from your smartphone.
Screenshots
Verdict
The clearest difference is in-app purchases: OTEC at none against AurumTools's 2. OTEC also leads on ads (none vs shown) and iOS requirement (14.0.0 vs 16.6). On price, update cadence 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. AurumTools sells 2 in-app purchases, starting at $5.90 per month. OTEC asks for nothing beyond the download.
AurumTools ships an update every 6 weeks, OTEC monthly. The most recent releases landed on October 5, 2026 and October 1, 2026 respectively.
| Parameter | AurumTools | OTEC |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 6 weeks | Monthly — better |
| Ads | Yes | No — better |
| In-app purchases | Yes | No — better |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 16.6 | 14.0.0 — better |
| Further details — not scored | ||
| Size | 56 MB | 24 MB |
| Age rating | 4+ | 4+ |
| Developer | Kaddick Goldschmiede | OTEC Präzisionsfinish GmbH |
In-app purchases
AurumTools
- Monthly$5.901 Month
- Yearly7 Days trial$59.001 Year
OTEC
No in-app purchases








