AquaTru Classic (Smart) Review: Lab Analysis & Hands-On Testing

Full Analysis of the AquaTru Classic and Classic Smart

Please note: AquaTru Classic and AquaTru Classic Smart are identical in terms of filtration hardware, performance, NSF/ANSI certifications, and usability. The only difference is the Classic Smart’s app integration for monitoring water quality, usage, filter status, and more.

Filtration: 5.00/5.00

The AquaTru Classic countertop RO system scored 5.00/5.00 for filtration. How? Most importantly, it achieved excellent results in both our 2024 and 2025 lab testing and the filtered water had a clean taste and no odor. In addition, the system is fully NSF/ANSI-certified for the reduction of all the important contaminants – 85 in total.

1. Lab Results: 5.00/5.00 (2025) & 4.97/5.00 (2024)

In our 2024 and 2025 lab tests comparing an unfiltered and a filtered tap water sample, the AquaTru Classic could remove 13 undesirable impurities and contaminants to below the minimum detection level (so essentially to 100%): chlorine, bromodichloromethane, bromoform, dibromochloromethane, chloroform, copper, barium, boron, iron, manganese, zinc, nitrate, and uranium.

The following substances remained in our water:

• Strontium was reduced by a very high 96% in 2024 and was completely removed in 2025.
• Fluoride was reduced by a minimum of 41% (moderate) and up to 99% (very high) in 2024. This range indicates some fluoride was left in the water but it was so little that the lab couldn’t quantify precisely how much was left. The actual reduction rate is probably much higher, because the AquaTru Classic is NSF/ANSI-certified for fluoride reduction with an average reduction rate of 93.50% according to the official performance data sheet. This was confirmed in our 2025 lab test – we used a different and more precise fluoride detection method and fluoride was completely eliminated.

Finally, TDS decreased by 91% in 2024 and by 94% in 2025. While TDS should not be interpreted independently, as it does not override inadequate removal of individual contaminants, ≥90% TDS reduction is high and shows that the RO membrane works as intended.

Aside from contaminant reduction, we found aluminum (0.05 ppm) in our 2024 filtered water that was not present in the unfiltered water, suggesting potential leaching. While not ideal, it was still well below the strictest health guideline on aluminum we could find of 0.6 ppm per the OEHHA. Fortunately, there was no evidence of potential leaching in our 2025 lab tests.

Lab Results Charts

2. NSF/ANSI Certifications and Other Test Data

The AquaTru Classic is fully NSF/ANSI-certified by the IAPMO for the reduction of all the important contaminants – we counted 85 in total – against NSF/ANSI standards 42, 53, 58, and 401.

Reported reduction rates include:

• Organics, including VOCs, herbicides, pesticides, and DBPs (95.00-99.50%+)
• PFOA/PFOS (97.50%+)
• Chlorine (97.00%)
• Chloramine (96.00%)
• Emerging contaminants, including trace pharmaceuticals (86.70-99.00%)
• Microplastics (96.48%)
• Arsenic V (98.00%)
• Barium (96.40%)
• Chromium 3 (98.00%)
• Chromium 6 (97.20%)
• Lead (10%)
• TDS (10%)
• Cysts (99.99%)
• Fluoride (93.50%)
• Nitrate (87.20%)
• Nitrite (90.20%)
• Perchlorate (98.50%)
• Radium 226/228 (96.40%)
• Selenium (98.10%)

Reduction rates are per the official performance data sheet.

This comprehensive NSF/ANSI certification makes the AquaTru Classic really stand out from the competition. In fact, we don’t know of a single countertop water filter except the AquaTru Carafe that even remotely compares.

3. Filtration Process

We have 3 filter cartridges which comprise 4 filtration stages.

• Stages 1+2 are performed by the composite pre-filter (sediment pre-filter + coconut-shell granular activated carbon). The sediment filter is mechanical filtration – it acts like a sieve to remove solid, undissolved particulates such as dirt or rust. Granular activated carbon removes things like bad tastes and odors, chlorine/chloramine, disinfection byproducts and other organics, as well as certain metals. By removing chlorine and other contaminants, this pre-filter protects the RO membrane from damage.
• Stage 3 is performed by the RO membrane, which uses reverse osmosis to effectively remove the vast majority of contaminants and minerals.
• Stage 4 is an activated coconut-shell carbon block post-filter, which acts as a “polishing” filter to remove lingering bad tastes/odors and VOCs. In addition, the block structure provides fine mechanical filtration due to its smaller pore size compared to granular carbon.

4. Taste and Odor Tests

In our 2024 and 2025 tests, the filtered water was odorless and had a perfectly clean taste.

Usability: 4.24/5.00 (Classic Smart: 4.64/5.00)

The AquaTru Classic achieved a usability score of 4.24/5.00, based on its performance in the following categories:

1. Initial system assembly including filter priming (0.80/0.80)
2. Everyday use (2.94/3.70)
3. Filter replacements (0.50/0.50)

The AquaTru Classic Smart achieved a usability score of 4.64/5.00, based on:

1. Initial system assembly including filter priming (0.80/0.80)
2. Everyday use (3.34/3.70)
3. Filter replacements (0.50/0.50)

1. Initial Setup: 0.80/0.80

Assembling the AquaTru Classic is easy and straightforward. In addition to clear, illustrated directions in the thorough owner’s manual and helpful quick start guide, a convenient QR code also links users to tutorial videos on YouTube. Labeled, color-coded filters make initial filter insertion simple.

However, while setup was flawless in 2025, we had a small issue with our 2024 unit – it didn’t work at first because we got water into the handle. After letting it dry, the setup process proceeded without a hitch.

Here’s a quick breakdown of the setup procedure:

1. After washing your hands and cleaning your work surface, wash feed and filtered tanks with soap and rinse.
2. Remove the side panel by sliding up from the bottom. Insert the filters into their corresponding filter bases by turning in a clockwise direction. Match the label numbers and colors on the filters and their respective bases; bases pivot outward to make installation easier.
3. Pivot filters back to a vertical position and replace the side panel.
4. Fill tap water tank with cold water and then reinstall, ensuring that both tanks are properly seated.
5. Plug in unit and turn power switch to “on.” It will begin filtering water automatically. Lights on the display will cycle through filter symbols during this process.
6. The AquaTru Classic will stop filtering when the filtered water tank is full or it is time to refill the tap water tank.
7. Empty and rinse both the feed and filtered water tanks.
8. Refill the feed tank, reinstall both tanks on the base, and repeat the filtration process 3 more times, for a total of 4 full filtration cycles.
9. Now your AquaTru Classic is ready to use.

For the Classic Smart, setup is exactly the same, only that you start by connecting the app via Wi-Fi which was easy, though we had to close and reopen it during the first attempt. After that, it worked consistently. Both the owner’s manual and quick start guide provide QR codes which link to the iOS or Android app stores.

2. Day-to-Day Use: 2.94/3.70 (Classic Smart: 3.34/3.70)

2.1 Speed & Water Capacity: 1.14/1.40

The AquaTru Classic is well-suited for daily use. Firstly, its large clean tank stores plenty of water for later – up to 12 cups (0.75 gal) after filtering a full feed tank (~1.09 gal). Consequently, you can fill a 40-oz bottle or 2-quart pitcher on a single refill all in one go – no need to perform multiple feed tank refills or wait for additional cycles of water processing.

More specifically and based on a single feed tank, in our test the system could dispense 83 oz in one continuous pour. Rounding up, we estimate 3 (average) or 4 (more than average) daily refills for the average US and US-family households, respectively.

In addition, the AquaTru Classic filters fast enough to meet the daily water needs of the average-sized US households, and it can handle thirst bursts. In our ambient water speed tests, it could dispense 1 cup in 3 sec and 4 cups in 14.5 sec when the water was pre-processed, meaning the feed tank was filled and allowed to fully filter all its water first. Upon refilling, it took 4:45 min to dispense 4 cups of water.

2.2 Dispensing: 0.90/1.00

Dispensing water is easy and splash-free – simply press the blue button on the front. However, the clean tank needs to be lifted and angled forward in order to empty it completely. Also, pouring into large/tall glasses or carafes is only possible if the unit sits on the edge of the counter or you lift the clean tank, as the spout height is relatively low (6.5” from the base).

2.3 Refilling & Size: 0.70/0.70

Refilling the AquaTru Classic is straightforward; the feed water tank is easy to remove, fill, and place back on its base. There is no max fill line but the instructions say to fill to “just below the handle,” which is clear enough. Note: whether you get the advertised 12 cups of filtered water on a single refill versus the ~10.5 cups we obtained in our testing is determined by your water conditions and how high you fill the feed tank.

We appreciate the simplicity of refilling: unless there is filtered water remaining in the clean tank, the Classic processes the entire feed tank at one time – this takes about 12-15 minutes. You simply discard the feed tank’s wastewater and refill after each cycle. With other systems, you need to pay attention to the tank status indicators because they may not process the entire feed tank at once. However, if there is still some water left in the clean tank when you initiate a new filtration cycle, it might fill up before the entire feed tank has processed.

The front panel has a water shortage (“Empty & Refill Tap Tank”) indicator to remind you to discard the wastewater from the feed tank before refilling.

Measuring 12”x14”x14” (WxHxD), the AquaTru Classic fits under standard height (18”) kitchen cabinets, and at 17.8 lb, it’s of average weight compared to the other countertop RO systems we tested. That said, the system has an above-average footprint, occupying 168 in² (~1.17 ft²), and it is not streamlined enough to fit in narrow spaces.

Classic Smart: The app also reminds you to empty the wastewater prior to refilling the feed tank.

2.3 Other: 0.20/0.60 (Classic Smart: 0.60/0.60)

The portable clean water tank is easy to move and lift thanks to its handle, and it fits on a standard fridge shelf for chilling and easy dispensing.

The Classic Smart app is easy to navigate and tracks feed and filtered water quality (TDS), gallons filtered, water consumption (daily, weekly, monthly, yearly), and filter status. However, numerical values for TDS readings are not provided; instead the app shows “Low,” “Medium,” “High,” or “Very High” for feed and clean water, which is less useful than actual numbers.

3. Filter Replacements: 0.50/0.50

Filter replacements are easy: the side panel slides up, enabling quick access to the filters, which are labeled, color-coded, and quickly twist in/out. Plus, the filter bases on the unit pivot outward to make removing and installing even easier.

The filter change indicator lights on the front panel alert you when it is time to change each filter. Rated filter life for the composite pre-filter is 600 gal or 6 months, RO membrane is 1,200 gal or 2 years, and carbon post-filter is 600 gal or 12 months. Assuming 500 gallons of yearly water consumption for the average household, we predict the frequency of your filter changes will be dictated by filter age rather than water consumption. Therefore, expect to replace the various components every 6-24 months as indicated.

For the Classic Smart, the app displays remaining filter life and reminds you to replace filters (you can also set custom alerts). In addition, you can order replacement filters and other AquaTru products there.

Costs: 4.54/5.00 (Classic Smart: 4.55/5.00)

Based on value for money, the AquaTru Classic achieved a cost score of 4.54 out of 5.00, indicating it is relatively inexpensive for what it offers compared to competing systems (a score of 4.00 represents average value). Notably, while its upfront price is slightly above average, its annual filter replacement cost is well below average among the countertop RO systems we tested.

Similarly, the AquaTru Classic Smart achieved a cost score of 4.55 out of 5.00, indicating it also is relatively inexpensive compared to the competition. While its upfront price is well above average, its annual filter replacement cost is well below average.

1. Upfront Price

As of November 4, 2025, the AquaTru Classic is priced at $475. Utilizing one of our two affiliate links, you can either save $100, reducing the upfront cost to $375, or get 15% off ($403.75) plus a free 1-year filter set. This is still slightly above the $321.89 average across all the countertop RO systems we tested.

The AquaTru Classic Smart is priced at $525. Using our affiliate link, you can save $100, reducing the upfront cost to $425, which is well above the $321.89 average across all the countertop RO systems we tested.

2. Long-Term Expenses for Filter Replacements

Based on 500 gallons consumption and a 600-gal or 6-month (composite pre-filter), 1,200-gal or 2-year (RO membrane), and 600-gal or 12-month (carbon post-filter) filter life, we estimate $86 in annual filter replacement costs for the AquaTru Classic and Classic Smart, which is well below the $149.47 average across all the countertop ROs we tested.

3. Product Warranty

The system is covered by a 1-year warranty.

4. Other Cost Factors

• The system is made from medical-grade Tritan which, according to the manufacturer, is free from BPA, BPS, phthalate, and estrogen & androgen activity.

Additional

1. Pure-to-Drain Ratio Tests

We measured a pure-to-drain ratio of ~1:0.6 (2024) and ~1:0.61 (2025), which is low wastewater for RO systems in general and the exact average across the countertop RO systems we tested.

2. Construction

This system feels sturdy and well built. However, we envision the hinges on the feed tank lid not lasting over time.

3. Design

The AquaTru Classic has a unique design that may not appeal to everyone, as it appears rather bulky and utilitarian.

4. Optional Upgrade: Remineralization

Both AquaTru Classic and Classic Smart offer the option of replacing the standard stage 4 VOC carbon post-filter with a “Mineral Boost” alkaline VOC carbon post-filter, which adds healthy minerals like magnesium and calcium to your water while also alkalinizing it.

5. Frequent Customer Complaints

We read about issues with units that stopped working after a few months or years, as well as leaking. Other customers complained of poor customer service.

For the Classic Smart model, there were complaints of major issues on both iOS and Android (connection problems, app crashes, filter life reset not working, and tracking issues).

While we did not experience these issues firsthand, we did have trouble setting the AquaTru Classic up during our initial 2024 test since water got into the handle. Per the manufacturer, if the water level sensor in the top of the filtered water tank gets wet or has soap on it, it causes the unit to stop (or not start) filtering. This can be remedied by emptying and rinsing the inside, including the sensor, shaking water away from the sensor and potentially waiting a couple of hours to allow the tank to dry before attempting to restart the AquaTru. This worked for us.

For the app, we had to close and reopen it during initial setup in order to get it running, but we had no problems beyond that.

We also reached out to AquaTru in 2025, as our AquaTru Carafe wouldn’t filter at first. They did a great job solving the problem – our experience with customer service so far has been flawless.

Bottom Line: Our #1 Overall Countertop RO + #1 for Filtration (4.76/5.00; Classic Smart: 4.84/5.00)

Filtration weighted at 60%, and usability and cost at 20% each, the AquaTru Classic scored a final rating of 4.76 out of 5.00. The Classic Smart scored 4.84 out of 5.00.

If you are in the market for a countertop RO, the AquaTru Classic is our top pick. It takes the #1 spot (alongside its app-integrated counterpart, the AquaTru Classic Smart) for most effective filtration – achieving a perfect 5.00/5.00 in our filtration analysis. It completely removed all contaminants in our 2025 lab tests (all but 2 in our 2024 testing), comes fully NSF/ANSI-certified for the reduction of all the important contaminants, and its filtered water was odorless and tasted perfectly clean.

It clinched the best all-rounder status as well, as it is easy to setup, use, and maintain – even more so with the Classic Smart’s app. While upfront cost is above average, ongoing costs are well-below average, making either system a no-brainer purchase for those serious about their water.