SMS Alert vs VSim
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
SMS Alert
This app monitors temperature, humidity, analog signals, and power status for various devices. It sends alerts via SMS and phone calls when predefined limits are reached. Users can also query device status via text and schedule periodic reports.
- Temperature and humidity monitoring
- Analog signal monitoring (4-20mA, 0-5V)
- Power monitoring (single/three-phase)
- SMS and phone call alerts
- Remote status query via text
- Scheduled status reporting
- Modbus RTU/TCP cloud platform support
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RTU5023 (temperature and humidity monitoring), RTU5026 (temperature monitoring), RTU5027 (analog monitoring), RTU5028 (power monitoring), RTU5029 (3/single-phase power monitoring) series products are the temperature/humidity/analog power/voltage/monitoring alarm.Can be set up according to the practical application of temperature/humidity/analog/power supply voltage of the high and low limit alarm value, when the current value reaches the alarm value, when will send alarm messages and telephone inform the user. User can from the authorization number by calling equipment number, will automatically reject and immediately send current status messages to BoDaZhe, users can query the current state via text message instructions.Equipment can be set up on a daily basis fixed point and periodic reports the current status messages to the first user.At the same time support the Modbus RTU and Modbus TCP connection cloud platform, can through the network real-time monitoring of the current state. This series product can be used for monitoring temperature and humidity monitoring, 4~20 mA, or 0~5V DC voltage analog signal monitoring, monitoring, three-phase power single-phase power monitoring, monitoring, and is suitable for classrooms, public places, hospitals, railway stations, food warehouses, offices, factories, libraries, LABS and so on, and any needs to be monitored and support.
VSim
Get a temporary virtual phone number to receive SMS verification codes without revealing your personal number. Activate accounts quickly and maintain privacy from unwanted spam. All messages are conveniently stored within the app.
- Receive SMS verification codes
- Virtual numbers for account activation
- In-app message inbox
- Privacy protection
- Pay-as-you-go credits
- Supports popular platforms
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VSim — Virtual Number for SMS Verification Need an SMS verification code without sharing your personal phone number? VSim gives you a virtual number to receive SMS verification codes online, so you can activate accounts quickly and keep your real number private. What you can do with VSim * Receive SMS Verification Codes: Use a virtual number to get login and verification codes directly inside the app. * Fast & Simple Activation: Choose a country and service, copy the number, and verify in minutes. * In-App Inbox: All received messages appear in one place for a smooth verification experience. * Privacy-Focused: Keep your real phone number off websites and apps to reduce unwanted spam. * Pay-As-You-Go Credits: Transparent pricing. If no SMS is received within the allowed time, your credit is automatically refunded. How it works 1. Select a country and service 2. Copy the provided number and use it for verification 3. Receive the SMS code in the VSim inbox VSim can be used for verification on many popular platforms, including WhatsApp, Telegram, Facebook, Instagram, TikTok, Google, Snapchat, Tinder, Vinted, and more (availability varies by country and service). Privacy Policy: https://vsimapp.com/privacy-policy Terms of Use: https://vsimapp.com/terms-of-use
Screenshots
Verdict
The clearest difference is review sentiment: VSim at 84% against SMS Alert's 0%. VSim also leads on rating (4.7 vs 4.0) and update cadence (every 2 months vs every 14 months). SMS Alert's advantage is in-app purchases (none vs 6) and ads (none vs shown). On price 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. VSim sells 6 one-off in-app purchases. SMS Alert asks for nothing beyond the download.
VSim holds the better App Store score, 4.7 against 4.0. That said, the two scores are not equally well evidenced: VSim has 16K ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 0% of SMS Alert's written reviews are positive against 84% of VSim's.
SMS Alert ships an update every 14 months, VSim every 2 months. The most recent releases landed on October 5, 2026 and October 17, 2026 respectively.
| Parameter | SMS Alert | VSim |
|---|---|---|
| Price | Free | Free |
| Rating | 4.0 (2 ratings) | 4.7 (16K ratings) — better |
| Positive reviews | 0.0% of reviews | 84.5% of reviews — better |
| Number of ratings | 2 | 16K — better |
| Update frequency | Every 14 months | Every 2 months — better |
| Ads | No — better | Yes |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 9.0 — better | 13.0 |
| Further details — not scored | ||
| Size | 7 MB | 46 MB |
| Age rating | 4+ | 4+ |
| Developer | 朝山 马 | Elmond |
Customer experience
SMS Alert
VSim
Bugs and requests
SMS Alert
Not enough reviews yet to summarise bugs or requests.
VSim
Reported bugs
3 issues- Verification codes not received
- Numbers already in use
- Account bans without explanation
Requested features
4 requests- Ability to earn free credits
- More number options
- Improved privacy policy
- Better FAQ and community support
In-app purchases
SMS Alert
No in-app purchases
VSim
- 10 Credit$0.99
- 30 Credit$2.99
- 50 Credit$4.99
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- 100 Credit$9.99
- 250 Credit$24.99
- 500 credit$49.99









