KOSO Magic vs eRacingBattery
Price, ratings, monetisation and update history for both apps, side by side โ with what reviewers say about each.
KOSO Magic
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KOSO Flasher is a tool used through a mobile app to adjust KOSO's motorcycle turn signals. It connects via Bluetooth and is used to adjust the turn signal flashing frequency, interval, flashing sound effects, and volume. By connecting to the device's network, you can also upload custom sound files to use as flashing sound effects.
eRacingBattery
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The eRacingBattery APP is a platform provided by aRacer for monitoring and adjusting racing battery. It offers data monitoring, function switching and data recording etc. The eRacingBattery has built-in powerful features, including: 1. Individual cell voltage and total voltage monitoring. 2. Current monitoring. 3. Over-voltage, over-current, and short circuit protection. 4. Protection status monitoring (fault codes, cell protection, balancing). 5. MOS temperature, mainboard temperature, and shunt temperature monitoring. 6. LED indicator lights (Bluetooth connection: blue flashing, Touch indication: steady blue). 7. Battery state of charge (SoC). 8. Touch wake-up function (to wake up from ECO mode). 9. ECO/BOSS mode. Please note the following: Before using the product, please carefully read this user manual and ensure that you fully understand and comply with the instructions. The company will not be held responsible for any damages resulting from improper use of the product contrary to the instructions provided in this manual. Do not place the battery near a fire source or in an environment with temperatures exceeding 60 degrees Celsius to avoid overheating or safety issues. Do not place the battery in locations where it may be splashed or exposed to water or saltwater to prevent damage or short circuits. Do not short-circuit the positive and negative terminals of the battery to avoid excessive current and battery damage. Do not reverse the positive and negative terminals of the battery with the device to prevent incorrect current flow and damage to the device. Do not disassemble or modify the battery, as this may result in battery damage, leakage, or the release of hazardous substances. Please dispose of the battery properly by handing it over to professionals. If you notice abnormally high temperature, unusual odor, or fire from the battery, immediately stop using the battery and seek professional assistance to prevent potential hazards. Unless the product itself has manufacturing defects, the company will not be held responsible for any damages caused by the product's improper use contrary to the instructions provided in this manual.
Screenshots
Verdict
The clearest difference is in-app purchases: eRacingBattery at none against KOSO Magic's 4. eRacingBattery also leads on iOS requirement (12.0 vs 15.0). On price, update cadence, ads and device support there is nothing between them.
Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS
Both are free to download. KOSO Magic sells 4 one-off in-app purchases. eRacingBattery asks for nothing beyond the download.
KOSO Magic ships an update every 3 weeks, eRacingBattery every 6 weeks. The most recent releases landed on September 16, 2026 and September 12, 2026 respectively.
| Parameter | KOSO Magic | eRacingBattery |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 3 weeks โ better | Every 6 weeks |
| Ads | No | No |
| In-app purchases | Yes | No โ better |
| Devices | iPhone, iPad, iPod โ better | iPhone, iPod |
| Requires iOS | 15.0 | 12.0 โ better |
| Further details โ not scored | ||
| Size | 110 MB | 18 MB |
| Age rating | 4+ | 4+ |
| Developer | Tong Yah Electronic Technology Co., Ltd. | ARACER SPEEDTEK INC. |
In-app purchases
KOSO Magic
- 30 KOSO COINS$0.99
- 60 KOSO COINS$1.99
- 120 KOSO COINS$3.99
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- 240 KOSO COINS$6.99
eRacingBattery
No in-app purchases








