jBot App vs EMF Detector
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
jBot App
Monitor your trading bot's performance in real-time. Get instant access to your trading results, including win rates, P&L, and account value, from anywhere. View detailed trade history and performance charts to stay connected to your trading.
- Real-time performance tracking
- Dashboard with key metrics
- Detailed trade history
- Performance charts
- Secure sign-in options
- Cross-device compatibility
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Track your trading performance in real-time with jBot. jBot connects to your NinjaTrader automated trading bot and gives you instant visibility into your trading results from anywhere. Dashboard at a Glance • Win rate percentage • Average winning and losing trade amounts • Total P&L and account value • Visual performance gauges Complete Trade History • View every trade with entry/exit prices and times • See P&L for each trade • Track your running account balance Performance Charts • Cumulative P&L chart • Filter by date range (week, month, or all time) • Tap data points for detailed trade info Secure Access • Sign in with Apple or Google • Your data stays private and secure Whether you're away from your desk or just want a quick performance check, jBot keeps you connected to your trading results.
EMF Detector
This app uses your phone's magnetometer to measure and display magnetic fields. It offers standard and paranormal measurement modes, helps locate sources of EMF, and allows you to record and export your readings.
- Live magnetic field gauge
- Standard and paranormal modes
- Source finding tool
- Measurement session recording
- CSV export
- 24-hour exposure chart
- Spirit Box entertainment mode
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EMF Detector reads your phone's magnetometer and shows the magnetic field around you in µT or mG: on a live gauge, as separate X, Y and Z axes, and over the last 24 hours. START IN ONE TAP Tap the gauge, or the green START button under it. The app first separates the phone's own magnetism from the field around you. While it says "Calibrating…", turn the phone slowly in a figure-8 for a few seconds; the live reading then appears and stays steadier while you tilt the phone. A short vibration confirms every start and stop. TWO WAYS TO MEASURE • Standard: a radial gauge with plain-language levels from "No EMF detected" upward. In Settings you can switch it to a Safety view that labels a reading as background, weak field, wiring detected or live wire (an estimate from field strength, not proof of a wire) and sets it against ICNIRP reference levels for the general public or for workers. • Paranormal: records a quiet baseline first, then rates each spike against it on a five-step scale and marks it on a session timeline. FIND THE SOURCE The Source tab turns the reading into a warmer / colder hunt. Move the phone slowly around the room; the indicator shows whether the reading is rising or falling, and the X/Y/Z bars show the sensor's value on each axis. KEEP A RECORD • Measurement sessions are saved with their minimum, average and maximum • A 7-day trend with insights, such as how a reading compares with your usual level • Notes and favorites for each reading, plus a side-by-side compare view • CSV export of your history, and share-as-image for the current reading • A 24-hour exposure chart on the main screen • Peak hold, and "Zero here" to re-learn the baseline in a new spot • Calibration offset, µT or mG units, and a choice of reference levels TIPS FOR A GOOD READING 1. Start away from speakers, magnetic cases and car mounts, and do the figure-8 until the number appears. 2. Hold the phone flat and sweep slowly, a few centimetres from the wall or appliance. 3. Watch for a rise against your starting level rather than one absolute number. 4. Tap "Zero here" when you move to a new room so the baseline is re-learned there. FOR GHOST-HUNTING NIGHTS Spirit Box turns the live field into pulses, vibration and spoken words. It is entertainment: field spikes come from wiring, motors, magnets and the phone itself, and no spirits are detected. A Halloween theme can be switched on in Settings. HONEST TECH NOTE A phone magnetometer measures static and slowly changing magnetic fields: steel, magnets, motors, transformers and wiring under load. It samples about ten times a second, so it cannot measure 50/60 Hz mains fields accurately, and it cannot detect radio frequency, Wi-Fi, 5G or radiation. It is not a certified safety instrument; use it to explore and compare readings around your home. Made for curious people comparing readings around appliances and from room to room, and for paranormal investigators.
Screenshots
Verdict
The clearest difference is rating: jBot App at 5.0 against EMF Detector's 3.9. jBot App also leads on ads (none vs shown) and monetization model (free vs ad-supported). EMF Detector's advantage is ratings volume (9 vs 2) and iOS requirement (16.4 vs 26.0). On price, update cadence, 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.
jBot App holds the better App Store score, 5.0 against 3.9. Both are backed by a comparable volume of ratings — 2 and 9 respectively.
jBot App ships an update every 3 days, EMF Detector every 5 days. The most recent releases landed on October 31, 2026 and November 9, 2026 respectively.
| Parameter | jBot App | EMF Detector |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (2 ratings) — better | 3.9 (9 ratings) |
| Number of ratings | 2 | 9 — better |
| Update frequency | Every 3 days — better | Every 5 days |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Monetization | Free — better | Ad-supported |
| Devices | iPhone, iPad — better | iPhone |
| Requires iOS | 26.0 | 16.4 — better |
| Further details — not scored | ||
| Size | 13 MB | 79 MB |
| Age rating | 4+ | 17+ |
| Developer | Kris Russell | Kyu-Hee Jang |
Customer experience
jBot App
EMF Detector
In-app purchases
jBot App
No in-app purchases
EMF Detector
No in-app purchases









