KL500A vs BLE Relay Bluetooth
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
KL500A
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KL500 A系列电压电流表是一款能测量电压、电流、功率、充放电容量、瓦时、时间等多种物理参数的新型库仑计， 同时也可以设定参数实现过压保护、欠压保护、过流保护、过功率保护、过温保护及限时保护等多种保护功能。 该仪表能够自动识别电流的方向，并且对电池容量可以进行实时监控且采用彩色液晶显示被测数据，显示信息全面、人性化。 KL500A系列电压电流表在原有功能基础上加入电压电流曲线显示及导出的功能，同时可以使用手机 APP控制显示，也可以实时对固件进行更新升
BLE Relay Bluetooth
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Ble Relay Bluetooth — control BLE relays and selected smart locks from your iPhone, anywhere in the world. Built for riders and makers who need a fast, reliable way to arm a motorcycle contact, switch channels, or open a lock—without digging through complicated tools. Relays that just work Connect popular BLE modules including A72Z / XY-MBO21F (NBH), LC Tech (A0), DSD TECH, JDY / HM-10 UART, ZL / TwoSwitch, plus prepared profiles for Tuya, Shelly, Sonoff, ESP DIY and generic GATT. Auto-detect or pick the brand manually. Set proximity from 1–10 m, calibrate on site, adjust RSSI thresholds, TX power, PIN, name, bonding and more. Motorcycle contact, done right Turn the contact ON or OFF from the app, the widget, or Siri—while keeping the app in the background. Auto-connect when you get within ~10 m of your saved module. One-tap control on iPhone Duo’s cover display. Smart locks ready Browse 10 major lock brands. Nuki users can unlock, lock and unlatch over the local Bridge HTTP API (LAN). Other brands are prepared for upcoming full support. Built for real use 41 languages Device info panel (firmware, UUID, RSSI, settings) Auto-connect toggle & forget module AT / HEX console for power users Secure PIN storage for reconnect / Siri / widget Requirements iOS 17+, Bluetooth LE module or Nuki Bridge on your network. Not for audio devices or classic Bluetooth. Download once. Pair once. Control your relay—or your lock—every day. Support: contact the developer via the App Store page.
Screenshots
Verdict
The clearest difference is price: KL500A at Free against BLE Relay Bluetooth's $2.99. KL500A also leads on iOS requirement (11.0 vs 17.0). BLE Relay Bluetooth's advantage is update cadence (every 4 days vs every 4 weeks). On 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
KL500A is free to download; BLE Relay Bluetooth costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.
KL500A ships an update every 4 weeks, BLE Relay Bluetooth every 4 days. The most recent releases landed on November 3, 2026 and November 6, 2026 respectively.
| Parameter | KL500A | BLE Relay Bluetooth |
|---|---|---|
| Price | Free — better | $2.99 |
| Update frequency | Every 4 weeks | Every 4 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 11.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 31 MB | 4 MB |
| Age rating | 17+ | 4+ |
| Developer | 磊磊 周 | anthony Plaisir |
In-app purchases
KL500A
No in-app purchases
BLE Relay Bluetooth
No in-app purchases
Questions
Is KL500A free?
Is BLE Relay Bluetooth free?
Do KL500A or BLE Relay Bluetooth have ads?
Which is updated more often, KL500A or BLE Relay Bluetooth?
Other comparisons
