SIMPlus vs SLS Echon
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
SIMPlus
This app transforms your iPhone into a dual SIM device, enabling mobile phone functionality on your iPad and iPod. It also offers VoIP-PSTN calling when a BLE device isn't connected.
- Dual SIM functionality on iPhone
- Mobile functionality for iPad and iPod
- VoIP-PSTN calling
- BLE device integration
- Call recording
- International travel savings
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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.
SLS Echon
Easily buy tickets and schedule appointments for Echon Studio. Manage your visits and plan your experience with this convenient utility.
- Purchase tickets
- Book appointments
- Visit Echon Studio
- Manage visits
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This app lets users purchase tickets and book appointments to visit Echon Studio.
Screenshots
Verdict
The clearest difference is rating: SLS Echon at 5.0 against SIMPlus's 3.6. SLS Echon also leads on in-app purchases (none vs 10) and update cadence (daily vs fortnightly). SIMPlus's advantage is ratings volume (167 vs 1) and iOS requirement (15.0 vs 18.0). On price, 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. SLS Echon asks for nothing beyond the download.
SLS Echon holds the better App Store score, 5.0 against 3.6. That said, the two scores are not equally well evidenced: SIMPlus has 167 ratings behind it against 1, so its average is the more settled of the two.
SIMPlus ships an update fortnightly, SLS Echon daily. The most recent releases landed on November 11, 2026 and October 31, 2026 respectively.
| Parameter | SIMPlus | SLS Echon |
|---|---|---|
| Price | Free | Free |
| Rating | 3.6 (167 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 41.8% of reviews | — |
| Number of ratings | 167 — better | 1 |
| Update frequency | Fortnightly | Daily — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 15.0 — better | 18.0 |
| Further details — not scored | ||
| Size | 41 MB | 11 MB |
| Age rating | 4+ | 4+ |
| Developer | 均 魏 | XINGYU LIANG |
Customer experience
SIMPlus
SLS Echon
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
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- 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
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- 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
SLS Echon
Not enough reviews yet to summarise bugs or requests.
In-app purchases
SIMPlus
- 10 minutes VOIP on SIMPlus$0.99
- SIMPlus Widget$0.99
- 20 minutes VOIP on SIMPlus$1.99
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- 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
SLS Echon
No in-app purchases
