APTROCK vs AquaMetr
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
APTROCK
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This app is used with the NFC smart lock provided by 4quad (www.4quad.com), which has no battery, no charging, high security, easy to use. With this APP you can manage multiple locks, quickly Lock & UnLock the lock, manage lock passwords, read & write the NDEF information etc.
AquaMetr
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AquaMetr app is a free app designed to work with the water TDS card from Silicon Craft Technology PLC (SIC). This app provides functions to measure TDS value from drinking water, record date, time and location of each measurement, display the measurement history.
Screenshots
Verdict
The clearest difference is update cadence: AquaMetr at monthly against APTROCK's every 3 months. APTROCK's advantage is iOS requirement (13.0 vs 17.6). On price, ads, in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.
APTROCK ships an update every 3 months, AquaMetr monthly. The most recent releases landed on May 16, 2026 and September 19, 2026 respectively.
| Parameter | APTROCK | AquaMetr |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 3 months | Monthly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPod — better | iPhone |
| Requires iOS | 13.0 — better | 17.6 |
| Further details — not scored | ||
| Size | 48 MB | 25 MB |
| Age rating | 4+ | 4+ |
| Developer | Sixiangxian Enterprise Development (Shanghai) Co., Ltd. | SILICON CRAFT TECHNOLOGY PUBLIC COMPANY LIMITED |
In-app purchases
APTROCK
No in-app purchases
AquaMetr
No in-app purchases
