
ICO Pool
From $449
On the headline specs, Aiper is formidable: hourly readings, direct Wi-Fi and conductivity on every model for less money. The ownership details change the result — a 15-day documented battery rating, 60-day calibration and support-only probes make ICO the lower-maintenance choice.
ICO pairs a 6+ month charge interval with seasonal calibration and replacement probes sold at published prices.

From $449

$359.99 base list; newer generations may differ
These are the ownership differences that matter after the unboxing, not a list of every marketing feature.
| Category | ICO Pool Our pick | Aiper HydroSync |
|---|---|---|
| Typical purchase price | $449 Chlorine / Bromine · $499 Salt | $359.99 base list; newer generations may differ |
| Automatic reading schedule | Every hour — 24 readings per day | Every hour |
| What it measures | pH, ORP and temperature; ICO Salt also reports salt / TDS | pH, ORP, electrical conductivity, TDS and temperature |
| Subscription / refills | No app fee, test cassette or reagent refill | No required subscription or per-test refill advertised |
| Connection | Direct 2.4 GHz Wi-Fi plus Bluetooth; no gateway | Direct 2.4 GHz Wi-Fi plus Bluetooth |
| Power | USB-rechargeable battery; rated for 6+ months per charge | Solar-assisted rechargeable battery; documented older-model rating is 15 days |
| Sensors and service parts | pH, ORP and TDS probes replace individually; Smart Core is also replaceable | Replacement probes go through Aiper support; public pricing was not verified |
| Warranty | 1-year limited manufacturer warranty | 24 months on the device body; analyzer-kit exclusions appear in U.S. terms |
| Where it goes | Floats in the pool or sits in the skimmer | Floats in the pool |
| Overall winner | ICO Pool ICO pairs a 6+ month charge interval with seasonal calibration and replacement probes sold at published prices. | Not our overall pick Its strongest use case is covered honestly below. |
HydroSync reads pH, ORP, temperature, conductivity and TDS on the base model. Standard ICO leaves conductivity to the more expensive Salt version. Aiper therefore has the stronger measurement list at its starting price.
Neither monitor directly tests free chlorine. Both use ORP to follow sanitizer performance, so a drop kit still belongs in the routine.
The documented HydroComm-era manual rates the battery at 15 days and calls for recalibration every 60 days. Solar input may extend the charging interval, but shade and weather make that benefit installation-dependent.
ICO is rated for 6+ months on a USB charge and asks for calibration once per season, or every six months for year-round use. That is a much lighter ownership schedule.
Aiper has used HydroComm, HydroSync, Pro and Pure naming across generations. The base page now says “Phase out,” while newer models do not always publish the same probe-life and battery details.
We would get the model number and applicable manual in writing. ICO's current probes and Smart Core are individually retail parts, so its out-of-warranty route is easier to price in advance.
Aiper offers a lot for less, including conductivity on every unit. We still recommend ICO because charging once or twice a season, calibrating seasonally and buying a known replacement probe are advantages you feel for years after the lower purchase price is forgotten.
Choose ICO if long battery intervals, infrequent calibration and an owner-serviceable monitor matter more than the lowest initial price.
Choose Aiper if you want EC / TDS on the least expensive model and are comfortable confirming the exact generation, probe support and warranty exclusions first.
ICO Pool is our overall winner. ICO pairs a 6+ month charge interval with seasonal calibration and replacement probes sold at published prices.
It reports conductivity and TDS, which can be used to follow dissolved solids and salinity trends. Make sure the app's displayed salt units for the exact HydroSync generation you are considering.
The older HydroComm manual documents a 15-day battery rating, with a solar panel that may extend runtime. Newer HydroSync generations may differ, so check the manual tied to the exact model.
ICO has a much longer documented charge interval, a seasonal calibration schedule and replacement probes with public prices. Those ownership details are the reason for our verdict.










Last fact-checked November 5, 2026 from manufacturer product pages, manuals and support material. This is an editorial feature comparison, not an independent laboratory accuracy test. Prices, stock and terms can change; make sure the exact model before ordering.