iRTCConnect vs SD
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
iRTCConnect
This app connects to school zone flasher systems via Bluetooth, allowing remote programming, timing adjustments, and relay control. It also displays directions to timeswitch locations on a map.
- Bluetooth connectivity
- Remote programming
- Timing adjustments
- Clock read/write
- Manual relay control
- Map directions to devices
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This APP is intended to be used with RTC Manufacturing school zone flasher systems. The APP will allow you to: > Connect to field devices directly through Bluetooth adapter placed on the timeswitch. This allows you to program the device from up to 40 feet away. > Change timing for storms or special events. > Read and write the clocks in the field. > Examine programming. > Manual control a relay on or off. > Show directions from users current position on map to any timeswitch location. You can use your agencyname / username and password in order to use this APP. Please email appsupport@rtc-traffic.com for any information or help. Thank you RTC Manufacturing 817 860 1217
SD
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Access Your TDC 2 From the Palm of Your Hand. The SD:TDC 2 app allows you to quickly access your Stalker Street Dynamics TDC 2 (Traffic Data Collector 2) to assist in installation and monitoring of the battery and memory status. Now from the safety of your service vehicle, you can view your current traffic count, check remaining battery power, or change data collection dates- all on your short-range wireless-capable phone. ………………………… APP FEATURES: - See real-time traffic detection for validating installation - View cumulative statistics for the current survey - View device 4G connection status (if equipped) and GPS information - Determine how much longer the current survey can run on available power - Setup a schedule for when survey should be active - Reset the TDC 2 to factory defaults
Screenshots
Verdict
The clearest difference is update cadence: SD at every 3 weeks against iRTCConnect's every 6 months. On price, 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
iRTCConnect ships an update every 6 months, SD every 3 weeks. The most recent releases landed on June 20, 2026 and May 19, 2026 respectively.
| Parameter | iRTCConnect | SD |
|---|---|---|
| Price | Free | Free |
| Rating | 4.7 (3 ratings) — better | — |
| Number of ratings | 3 — better | — |
| Update frequency | Every 6 months | Every 3 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 12.0 — better | 13.0 |
| Further details — not scored | ||
| Size | 3 MB | 10 MB |
| Age rating | 4+ | 17+ |
| Developer | RTC Manufacturing Inc. | Applied Concepts Incorporated |
In-app purchases
iRTCConnect
No in-app purchases
SD
No in-app purchases









