Comparison

ModTest Pro vs SOPlanning

Price, ratings, monetisation and update history for both apps, side by side โ€” with what reviewers say about each.

Head to head
About

ModTest Pro

Features
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MODTest Pro is a fast and simple utility for testing MODBUS devices over WiFi or Bluetooth. It supports a wide range of MODBUS functionality, including the ability to operate as a client or server (master or slave). It supports both TCP and UDP connections when using WiFi and it supports serial communication via many BLE modules equipped with Bluetooth 4 or higher that provide UART bridging capability. Tap the Setup button to enter the appropriate parameters for your device. Return to the main display to send your poll and view the data (when in client mode) or accept and respond to data requests from a master device (when in server mode). The Comm Setup view allows a number of addressing, timing, and communication mode parameters to be configured. Besides a comprehensive user guide, the app also has extensive built-in help. Tap on any yellow label or info button for a description of that parameter. The app supports MODBUS-TCP, -RTU, and -ASCII protocols, and they can all be transmitted via TCP, UDP, or Bluetooth. It also supports the GSI protocol which was developed in 1985 and was the first tank gauging protocol to use standard RS232/RS485 serial data communication. The app also features a User Data Mode that allows you to enter a complete poll string independent of any particular protocol. This allows transmission of special ASCII data polls or any MODBUS command that is not natively supported by the app. The following MODBUS function codes are supported: 1 โ€“ Read Coils 2 โ€“ Read Discrete Inputs 3 โ€“ Read Holding Registers 4 โ€“ Read Input Registers 5 โ€“ Write Single Coil 6 โ€“ Write Single Register 7 โ€“ Read Exception Status 15 โ€“ Write Multiple Coils 16 โ€“ Write Multiple Registers 17 โ€“ Report Server ID Addresses must be entered in standard MODBUS format (0-65535). If you are accustomed to specifying register addresses in "Modicon format", simply subtract 1 from the Modicon Address and delete the prefix number. For example, Modicon Holding Register 40101 is equivalent to MODBUS address 100. The app supports a wide range of data representations including: Unsigned Integer: 16 bit, 32 bit, and 64 bit Signed Integer: 16 bit, 32 bit, and 64 bit Floating Point: 32-bit, and 64-bit using IEEE-754 specifications Hex Data Strings: 16-bit, 32 bit, and 64-bit Bit and Byte Representations for Coils & Discrete Inputs The app also supports the following "reverse modes" of floating point data storage: Atomic 8-bit Little Endian Atomic 16-bit Little Endian PDP Endian Bit Reversal When you exit the Comm Setup page, WiFi connections will be established automatically; however, a manual scan must be initiated to find and select a BLE module within range in order to establish a Bluetooth connection. After a successful Wifi or BLE connection, simply tap the Start Poll button to send your poll command (when in client mode). Continuous polling is also supported. When in server mode, the app will wait for and respond to poll requests from a master device once a WiFi or BLE connection is made. The app scans for UART Service & TX/RX Characteristic UUIDs from BLE devices by a number of manufacturers. The UUIDs that are supported are detailed in the app User Guide. A communication status window will show the raw byte strings that are sent to and received from a remote device. Received data will also be shown in tabular form when in client mode and communication events will be shown when in server mode. The app also tracks a number of communication statistics. When using WiFi your device must be on the network as the device that you want to test. Be sure to use the Settings app to configure your network settings before using the app or you will surely get socket connection errors. The app contains no ads or in-app purchases and we will never nag you for reviews, although we do appreciate them. If you have any issues with the app, please send us a message before posting a negative review and give us a chance to address your concerns.

About

SOPlanning

Features
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SOPlanning is the official mobile app for accessing your SOPlanning instance from your smartphone. Designed for teams that use SOPlanning daily, the app lets you view and manage your tasks, schedules, and projects from anywhere, without needing to open a web browser. KEY FEATURES โ€ข Weekly, daily, and monthly schedules โ€” view your tasks in a layout that suits your workflow โ€ข Task details โ€” view the title, project, resources, location, and comments for each task โ€ข Task creation and editing โ€” add or update tasks directly from your mobile device โ€ข Task reminders โ€” receive notifications before tasks start, with customizable timing โ€ข Filters โ€” filter by user, project, or resource to focus on what matters most โ€ข Secure connection โ€” HTTPS connection to your SOPlanning instance with session persistence REQUIREMENTS This app requires an existing SOPlanning instance accessible via HTTPS. It does not function as a standalone application. Contact your SOPlanning administrator to obtain the login URL. SUPPORT For any questions or issues, please contact us at support@soplanning.org

Screenshots

ModTest Pro4 screens
SOPlanning4 screens

Verdict

The call

The clearest difference is price: SOPlanning at Free against ModTest Pro's $9.99. SOPlanning also leads on update cadence (every 3 days vs every 2 months). ModTest Pro's advantage is iOS requirement (13.0 vs 15.0). On ads, in-app purchases 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

CostPrice ยท In-app purchases ยท Ads ยท Monetization

SOPlanning is free to download; ModTest Pro costs $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

ModTest Pro ships an update every 2 months, SOPlanning every 3 days. The most recent releases landed on September 24, 2026 and October 9, 2026 respectively.

Scorecard3 real differences ยท 3 level
ModTest Pro versus SOPlanning: the parameters behind the verdict, then further details
ParameterModTest ProSOPlanning
Price$9.99Free โ€” better
Update frequencyEvery 2 monthsEvery 3 days โ€” better
AdsNoNo
In-app purchasesNoNo
DevicesiPhone, iPad, iPod โ€” betteriPhone, iPod
Requires iOS13.0 โ€” better15.0
Further details โ€” not scored
Size26 MB45 MB
Age rating4+4+
DeveloperDohmann Engineering ServicesSOADVANCE

In-app purchases

None

ModTest Pro

No in-app purchases

None

SOPlanning

No in-app purchases

Questions

Is ModTest Pro free?
ModTest Pro costs $9.99, with no in-app purchases.
Is SOPlanning free?
SOPlanning is free to download, with no in-app purchases.
Do ModTest Pro or SOPlanning have ads?
Neither ModTest Pro nor SOPlanning shows ads.
Which is updated more often, ModTest Pro or SOPlanning?
ModTest Pro ships an update every 2 months, and SOPlanning every 3 days. Most recently, ModTest Pro was updated on September 24, 2026 and SOPlanning on October 9, 2026.

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