Opson Pro vs Aqualis
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Opson Pro
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this is a tool for pool cleaner.
Aqualis
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Aqualis makes pool water chemistry simple. Take a photo of a water test — reactive strips or pH/chlorine drop tests — and AI reads the values for you. Aqualis saves them with date and time and tells you exactly how much product to add, based on the products you actually own. WHAT YOU CAN DO • Set up your pool with a wizard: shape, size and compensation tank, liters calculated automatically • Read pH, free chlorine, alkalinity and more from a simple photo • Get the exact dose, in grams or tablets, from YOUR products • Product inventory recognized from a photo: dichlor, trichlor, pH-, pH+ and more • Full history of measurements and treatments, with a used-products counter • Manual entry always available AQUALIS PRO One-time purchase: unlimited AI readings, unlimited pools, full history and no ads. Recommended doses are estimates for informational purposes: follow the manufacturer's instructions and always re-test after treatment. Terms of Use (EULA): https://aqualis.app/api/terms
Screenshots
Verdict
The clearest difference is in-app purchases: Opson Pro at none against Aqualis's 4. Opson Pro also leads on ads (none vs shown) and iOS requirement (12.0 vs 26.0). Aqualis's advantage is update cadence (every 3 days vs every 2 weeks). On price 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. Aqualis sells 4 in-app purchases, starting at $1.99 per month. Opson Pro asks for nothing beyond the download.
Opson Pro ships an update every 2 weeks, Aqualis every 3 days. The most recent releases landed on October 12, 2026 and October 6, 2026 respectively.
| Parameter | Opson Pro | Aqualis |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 2 weeks | Every 3 days — better |
| Ads | No — better | Yes |
| In-app purchases | No — better | Yes |
| Devices | iPhone, iPod — better | iPhone |
| Requires iOS | 12.0 — better | 26.0 |
| Further details — not scored | ||
| Size | 8 MB | 21 MB |
| Age rating | 4+ | 4+ |
| Developer | WYBOTICS CO.,LTD | vincent riga |
In-app purchases
Opson Pro
No in-app purchases
Aqualis
- Aqualis Pro$1.991 Month
- Aqualis Pro Quarterly$3.993 Months
- Aqualis Pro7 Days trial$12.991 Year
- Aqualis Pro — Lifetime$34.99
