KG Serials vs FE
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
KG Serials
This utility measures electrical parameters like voltage, current, and power. It offers multiple protection functions and real-time battery monitoring on a color LCD. The app also supports data export and remote control via mobile or PC.
- Measures voltage, current, power, capacity
- Multiple protection functions (over/under voltage, over current)
- Real-time battery monitoring
- Color LCD display
- Voltage and current curve display
- Mobile app and PC control
- Firmware updates
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The VAG series volt-ampere meter is a new type of coulomb counter that can measure various physical parameters such as voltage, current, power, charge and discharge capacity, watt-hours, time, etc. It can also set parameters to realize multiple protection functions such as over voltage protection, under voltage protection, over current protection, overpower protection, over temperature protection and time limit protection.The meter can automatically identify the direction of the current, and can monitor the battery capacity in real time and display the measured data in use color LCD screen. The VAG series voltage and current meters add voltage and current curve display and export functions on the basis of the original functions. At the same time, the mobile phone APP and host computer can be used to control, and the firmware can also be updated and upgraded in real time.
FE
Monitor your battery's charging status, remaining time, and historical data with this Bluetooth-connected device. It provides a comprehensive overview of your battery's performance.
- 500 amp battery monitoring
- Bluetooth connectivity
- Real-time charging status
- Remaining time estimation
- Historical battery data
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FE-Shunt is a versatile and easy-to-use 500 amp battery monitor.Connect to the FE-Shunt device via Bluetooth, you can read out all monitored battery parameters-such as charging status, remaining time, historical information, etc.
Screenshots
Verdict
KG Serials and FE both sit at 3.4 stars, but that hides the real split: 50% of FE's written reviews are positive against 0% of KG Serials's. KG Serials's advantage is iOS requirement (9.0 vs 15.6). On price, rating, ratings volume and update cadence 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.
On the App Store both sit at effectively the same score — 3.4 for KG Serials against 3.3 for FE. Both are backed by a comparable volume of ratings — 7 and 8 respectively. Written reviews are what separate them: 0% of KG Serials's written reviews are positive against 50% of FE's.
KG Serials ships an update monthly, FE every 3 weeks. The most recent releases landed on October 7, 2026 and October 6, 2026 respectively.
| Parameter | KG Serials | FE |
|---|---|---|
| Price | Free | Free |
| Rating | 3.4 (7 ratings) — better | 3.3 (8 ratings) |
| Positive reviews | 0.0% of reviews | 50.0% of reviews — better |
| Number of ratings | 7 | 8 — better |
| Update frequency | Monthly | Every 3 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 9.0 — better | 15.6 |
| Further details — not scored | ||
| Size | 30 MB | 18 MB |
| Age rating | 4+ | 4+ |
| Developer | Hangzhou Junce Instruments Co., Ltd. | Hangzhou Dashi Wisdom Technology Co., Ltd. |
Customer experience
KG Serials
FE
In-app purchases
KG Serials
No in-app purchases
FE
No in-app purchases
