Great for summer: Czechs love this waterproof phone case, and now it's significantly cheaper

Seaside holiday, swimming pool, river rafting – there are many situations where a phone can come into contact with water. And even if modern phones have some resistance, it’s usually not worth risking for a few hundred extra. You can now get the AlzaGuard WaterProof Active Shield Case for 194 Kč with code ALZADNY35 – it hasn’t been cheaper since January.

Quick summary:
✅ Makes sense if you want cheap insurance for your phone near water and don’t mind limitations when operating it underwater.
⚠️ Consider if you plan to actively photograph and film underwater – the touchscreen doesn’t work reliably underwater.
💡 For 194 Kč you get a case with 90% customer recommendation, a mere 0.08% return rate, and a three-year warranty.

Why this case is interesting

There are many waterproof phone cases, but most of them have one fundamental problem – if your phone slips out of your hand, it sinks. The AlzaGuard Active Shield Case has an air pocket filled with foam around its perimeter, so the phone reliably floats on the surface. You’ll especially appreciate this in the sea or on a paddleboard, where a submerged phone would be hard to find.

The case is certified according to the IPX8 standard, which means waterproofing when submerged to a depth of 30 meters for up to 30 minutes. This is more than enough for regular swimming, snorkeling, or water slides. In addition to water, it also protects against snow and dirt – so it’s also suitable for winter activities.

Key parameters explained simply

The case accommodates phones with a diagonal of up to 7.5″ – so practically anything from iPhone 16 Pro Max to Samsung Galaxy S25 Ultra to large Xiaomi or Redmi phones will fit. The only exception is foldable phones, which will not fit inside. The case dimensions are 22.5 × 12.5 cm, and the material is 0.3mm TPU and ABS plastic.

Both the front and back are transparent, so you can take photos and record videos. A neck strap is included in the package – practical when you don’t want to hold your phone all the time. Important note: the warranty is 36 months, which is an unusually long period for such an inexpensive accessory.

Practical side: what works and what doesn’t

Above the surface, the case works without problems – the touchscreen responds normally, you can take photos, record videos, and control apps. Users confirm that photo quality is fine and the case does not significantly degrade optics.

Underwater, the situation is different. The touchscreen practically doesn’t respond underwater – this is not a defect of the case, but a physical property of capacitive displays. If you want to film underwater, you must start recording above the surface and then submerge. The same applies to photography – use a self-timer or a hardware button. One user shares a tip for iPhone: the Guided Access feature allows you to disable touch and control the camera only with the volume buttons.

What users say

The case has a rating of 4.6 out of 5 (332 ratings) on Alza and is recommended by 90% of customers. With over 10,000 units sold, it is one of the most popular products in its category. The return rate is only 0.08% – an extremely low number that indicates reliability.

The most frequent praises are directed at the fact that the case really seals – dozens of users tested it in the sea, on water slides, while snorkeling up to 3 meters deep, and the phone remained dry. It is also appreciated that it floats on the surface and the neck strap is practical.

Critical voices repeatedly concern the impossibility of controlling the phone underwater. Several users describe that video spontaneously turned off, the phone zoomed, or even started calling underwater. This is not a defect of the case, but a consequence of how water droplets and pressure affect the touchscreen. The solution is to put the phone in airplane mode and start recording beforehand. A few reviews also mention that the black version heats up more in the sun and the glossy surface reduces display visibility in direct sunlight.

When it doesn’t make sense

If you plan to actively photograph and film underwater with full control over your phone, this case will probably disappoint you – touch control underwater simply doesn’t work reliably with any similar product. For professional underwater shots, there are special waterproof cases with physical buttons, but they cost many times more. Similarly, if you have a foldable phone – it won’t fit into the case.

Verdict: who it’s worth it for

For 194 Kč (the lowest price since January), you get reliable phone protection from water with the bonus of a floating design. It’s an ideal insurance for a seaside holiday, a swimming pool, or outdoor activities where contact with water is a risk. Don’t expect a professional underwater studio – but as protection against drowning your phone, it’s one of the best choices on the market at this price.

Do you take your phone to the water in a case, or do you rely on its own resistance?