SIMPlus vs WatchPower
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
SIMPlus
This app enables dual SIM functionality on your iPhone, allowing you to use two numbers simultaneously. It also provides mobile phone capabilities for iPads and iPods, with integrated VoIP-PSTN calling for when Bluetooth devices are not connected.
- Dual SIM iPhone functionality
- Mobile functionality for iPad/iPod
- BLE-enabled connectivity
- VoIP-PSTN call integration
- Use two numbers simultaneously
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SIMPlus is a BLE-enabled app that turns your iPhone into a dual sim phone and gives your iPad and iPod mobile phone functionality. VoIP-PSTN call also integrated when BLE device is not connected.
WatchPower
Monitor off-grid inverters remotely via Wi-Fi. View device status, configure settings, receive alerts for warnings or alarms, and record historical data.
- Monitor inverter status
- Configure device settings
- Receive warning/alarm notifications
- Record device data history
- Wi-Fi module integration
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WatchPower is an iOS monitoring application which can monitor off-grid inverters via Wi-Fi module. Here are the application uses: 1. Display device status during normal operation. 2. Configure device setting after installation. 3. Notify user when a warning or alarm happened. 4. Allow user record device data history.
Screenshots
Verdict
The clearest difference is rating: SIMPlus at 3.6 against WatchPower's 2.5. SIMPlus also leads on update cadence (fortnightly vs every 3 months) and review sentiment (41% vs 17%). WatchPower's advantage is in-app purchases (none vs 10) and iOS requirement (11.0 vs 15.0). On price, ratings volume, ads 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. SIMPlus sells 10 one-off in-app purchases. WatchPower asks for nothing beyond the download.
SIMPlus holds the better App Store score, 3.6 against 2.5. Both are backed by a comparable volume of ratings — 157 and 73 respectively. Written reviews point the same way: 41% of SIMPlus's written reviews are positive against 17% of WatchPower's.
SIMPlus ships an update fortnightly, WatchPower every 3 months. The most recent releases landed on September 21, 2026 and August 31, 2026 respectively.
| Parameter | SIMPlus | WatchPower |
|---|---|---|
| Price | Free | Free |
| Rating | 3.6 (157 ratings) — better | 2.5 (73 ratings) |
| Positive reviews | 41.2% of reviews — better | 17.2% of reviews |
| Number of ratings | 157 — better | 73 |
| Update frequency | Fortnightly — better | Every 3 months |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, iPod | iPhone, iPod |
| Requires iOS | 15.0 | 11.0 — better |
| Further details — not scored | ||
| Size | 27 MB | 22 MB |
| Age rating | 4+ | 4+ |
| Developer | 均 魏 | 祥梯 孟 |
Customer experience
SIMPlus
WatchPower
User reviews
SIMPlus
From 157 App Store ratingsWhat we love
- 📱 Dual SIM functionality on iPhone
- 🚀 Fast call and message delivery
- 💰 Saves money on roaming charges
- 🎨 Improved UI design in recent updates
- 📞 Call recording feature
Room to improve
- 🔌 Requires app to stay open in background
- 🔊 Poor call audio quality and voice issues
- 📉 Frequent disconnections
- 🐛 Multiple connectivity problems
- 📱 Incompatible with some iOS versions
WatchPower
From 73 App Store ratingsWhat we love
- 💻 Useful for monitoring and configuring solar/battery systems
- 🔧 Allows remote configuration of inverter settings
- 🤖 Reliable when it works
Room to improve
- 🐛 Frequent connection issues and data delays
- 🕰️ Slow refresh rate and outdated information
- 🤔 Inconsistent and unreliable performance
- 📊 Lack of historical data and graphing features
- 🤯 Difficult setup and registration process
Bugs and requests
SIMPlus
Reported bugs
20 issues- Call audio not working or distorted
- Device disconnects automatically after 1-2 minutes
- Bluetooth connection drops during calls
- Microphone not working with Bluetooth devices
- Network settings revert after saving
Show 15 moreShow fewer
- SMS messages display with Chinese characters
- Incoming calls show as 'unknown' contact
- App crashes on launch
- Connection failed error messages
- Device shows offline status
- Messages not saving after app close
- PIN code not saving
- Confirm button disappears on PIN entry
- Mobile data turns off unexpectedly
- Widget not auto-refreshing
- Time zone display incorrect
- Incoming calls not showing on Apple Watch
- No notification sound when locked
- App hangs with poor internet connection
- Incompatibility with iOS 17/18 updates
Requested features
20 requests- USSD code support for balance checks
- Apple Watch app integration
- Dark mode theme
- Conference call functionality
- Call waiting feature
Show 15 moreShow fewer
- Automatic OTP copying
- Separate ringtones for different SIMs
- Manual carrier selection option
- Background app operation without location services
- Contact synchronization
- SIM Toolkit (STK) application
- Default iOS dialer integration
- Network type selection (LTE only, etc.)
- Data roaming control options
- Widget auto-refresh
- Phone number display in app
- Scheduled message sending
- Call history from native phone app
- CarPlay support
- IMEI customization
WatchPower
Reported bugs
3 issues- Devices disappearing from the app
- Incorrect battery capacity and power readings
- Crashes and freezes when trying to access data
Requested features
5 requests- Add real-time monitoring and updates
- Improve user interface and add more visualizations
- Implement push notifications for important events
- Allow password recovery and account management
- Add support for Bluetooth connectivity
In-app purchases
SIMPlus
- 10 minutes VOIP on SIMPlus$0.99
- SIMPlus Widget$0.99
- 20 minutes VOIP on SIMPlus$1.99
Show 7 moreShow fewer
- Remote Device Server Access 30 Days$1.99
- 60 minutes VOIP on SIMPlus$4.99
- 100 minutes voice call$7.99
- 120 minutes VOIP on SIMPlus$7.99
- 270 minutes VOIP on SIMPlus$14.99
- Remote Device Server Access 1 Year$19.99
- Remote Device Lifetime Access$49.99
WatchPower
No in-app purchases
