3K Pro vs Lens thickness calculator
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
3K Pro
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3K Pro: See your purchases & manage warranties. Download now to elevate your eyewear experience!
Lens thickness calculator
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If you're wondering how thick your eyeglass lenses will be based on your prescription, Lens Thickness Calculator is here to help! This tool calculates the thickness of spherical monofocal lenses with precision, giving you complete control over your lens specifications. Perfect for opticians, optometrists, and eyewear professionals. MATERIAL SELECTION - 7 pre-configured optical materials with different refractive indices - Add custom refractive index - Compare thickness across different materials ADVANCED CALCULATIONS - Calculate astigmatic lens thickness at any cylinder angle - Account for any front surface curvature - Specify exact thickness at lens edge or center - Calculate required lens diameter by measuring frame settings MULTILINGUAL SUPPORT - English - Ukrainian - Portuguese - Hindi PROFESSIONAL TOOLS - Convert astigmatic lens to opposite cylinder notation - Side-by-side comparison of multiple lenses - Share calculation results via social networks
Screenshots
Verdict
The clearest difference is update cadence: 3K Pro at fortnightly against Lens thickness calculator's every 2 months. 3K Pro also leads on device support (3 vs 1) and iOS requirement (13.0 vs 18.6). On price, ads and in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.
3K Pro ships an update fortnightly, Lens thickness calculator every 2 months. The most recent releases landed on October 27, 2026 and October 31, 2026 respectively.
| Parameter | 3K Pro | Lens thickness calculator |
|---|---|---|
| Price | Free | Free |
| Update frequency | Fortnightly — better | Every 2 months |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 13.0 — better | 18.6 |
| Further details — not scored | ||
| Size | 62 MB | 39 MB |
| Age rating | 4+ | 4+ |
| Developer | Omar ElMesiry | Andrii Parkhomov |
In-app purchases
3K Pro
No in-app purchases
Lens thickness calculator
No in-app purchases
Questions
Is 3K Pro free?
Is Lens thickness calculator free?
Do 3K Pro or Lens thickness calculator have ads?
Which is updated more often, 3K Pro or Lens thickness calculator?
Other comparisons
