Keelin vs PH
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Keelin
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Keelin-Beacon is connected to our hardware STB1 device via Bluetooth for convenience. The STB1 is a BLE5.0de high-precision temperature sensor recorder that collects the ambient temperature of the device and uses Bluetooth broadcast to achieve 24-hour monitoring via Keelin-Beacon. 1. The current temperature value, voltage value and RSSI of nearby devices can be viewed through Bluetooth broadcast data. 2, historical data information (temperature + voltage + time, the most cocoa storage 4 days of data), at the same time can export data. Can be applied to logistics management, supply chain, warehouse, terminal and personal asset management.
PH
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Through PH-SOLAR new energy monitoring platform, users can centrally monitor, store, analyze and display the data and operation status of the power station, so as to know the operation management status of the power plant and the data energy efficiency analysis, and estimate the revenue, so as to provide a substantial scientific basis for the economic operation and the design of the power station. Through real-time communication technology, the fault information is processed and diagnosed quickly, which provides technical support for the safe operation of the power station.
Screenshots
Verdict
The clearest difference is update cadence: PH at fortnightly against Keelin's every 3 months. Keelin's advantage is iOS requirement (13.0 vs 15.6). 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.
Keelin ships an update every 3 months, PH fortnightly. The most recent releases landed on September 13, 2026 and October 25, 2026 respectively.
| Parameter | Keelin | PH |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 3 months | Fortnightly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPod | iPhone, iPod |
| Requires iOS | 13.0 — better | 15.6 |
| Further details — not scored | ||
| Size | 7 MB | 46 MB |
| Age rating | 4+ | 4+ |
| Developer | 佳喜 肖 | Suzhou zhongchupuhua Electric Technology Co., Ltd |
In-app purchases
Keelin
No in-app purchases
PH
No in-app purchases







