TEM2Go controller vs RAYSID
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
TEM2Go controller
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Introducing the TEM2Go Controller To operate seamlessly with the TEM2Go instrument developed by TEMcompany.
RAYSID
This app connects to a RAYSID gamma spectrometer via Bluetooth to display real-time radiation data. It offers detailed spectrum analysis, automatic isotope identification, and customizable device alarms. Data is stored locally on your phone.
- Real-time count rate and dose rate
- Automatic isotope identification
- High-resolution spectrum analysis
- Device threshold alarms with notifications
- Export spectrum data to N42 file
- Phone-side Geiger clicks
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Raysid is the iOS companion app for the RAYSID CsI(Tl) gamma spectrometer. Connect to your RAYSID over Bluetooth and see radiation in real time: • Live count rate (CPS) and dose rate (µSv/h) • Accumulated dose and yearly projection • 33-bin coarse histogram for quick scanning • 1800-channel high-resolution spectrum with log or linear axis • Automatic isotope identification against a built-in library of 43 reference spectra (natural, medical, and industrial isotopes) • Device threshold alarms with phone notifications, sound, and haptic • Phone-side Geiger clicks through the speaker, AirPods, or car audio • Export the high-resolution spectrum as a standards-compliant N42 file • Local radiation map: record your readings geotagged to where you took them, view them by count rate or dose, with an optional community layer. Recorded only while the app is open; your map stays on your device. You'll need a RAYSID device to use this app. Your measurements, location, and recorded map stay on your phone - nothing is uploaded. This app is an independent companion and is not affiliated with the RAYSID device manufacturer.
Screenshots
Verdict
The clearest difference is device support: TEM2Go controller at 3 against RAYSID's 1. TEM2Go controller also leads on iOS requirement (13.0 vs 16.0). On price, update cadence, ads and in-app purchases 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.
Both ship on a similar rhythm, roughly weekly. The most recent releases landed on September 11, 2026 and September 18, 2026 respectively.
| Parameter | TEM2Go controller | RAYSID |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (1 ratings) — better |
| Number of ratings | — | 1 — better |
| Update frequency | Weekly | Weekly |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Free |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 13.0 — better | 16.0 |
| Further details — not scored | ||
| Size | 27 MB | 145 MB |
| Age rating | 4+ | 4+ |
| Developer | Temcompany ApS | Isai Olvera |
In-app purchases
TEM2Go controller
No in-app purchases
RAYSID
No in-app purchases
