123\Tune+ vs MultiGauge
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
123\Tune+
Control your classic car's ignition wirelessly via Bluetooth. Adjust advance and vacuum curves, monitor real-time engine data, and utilize features like a PIN-code immobilizer and rev limiter. Compatible with a wide range of classic vehicles.
- Wireless ignition curve adjustment
- Real-time engine data monitoring
- PIN-code immobilizer
- Soft rev limiter
- Tune mode for timing tests
- MAP/boost sensor support
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Take full control of your classic car’s ignition with the 123\Tune+ app and distributor. Wirelessly adjust and upload custom advance and vacuum curves via Bluetooth. Monitor real-time engine data including RPM, battery voltage, distributor temperature, MAP pressure, ignition advance, and GPS speed. The 123\Tune+ offers advanced features like a PIN-code immobilizer for theft protection, a soft rev limiter, and a unique "Tune" mode for testing ignition timing impact on acceleration between two RPM points. Compatible with both 6V and 12V systems, CW and CCW rotation, and equipped with a MAP/boost sensor. Works with a wide range of classic vehicles — from Alfa Romeo and Jaguar to Volkswagen and Volvo. Visit 123ignition.com for supported models and more details.
MultiGauge
This application connects to specific hardware to display real-time sensor data from your vehicle on your smartphone. Monitor vital engine parameters like air-fuel ratio, temperature, and pressure for performance tuning and diagnostics.
- Real-time sensor data display
- Bluetooth LE connectivity
- Supports multiple sensor modules
- Visualizes engine parameters
- Compatible with PLX Devices hardware
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MultiGauge App is designed to function with the PLX Devices Multi Gauge Link hardware interface. The Multi Gauge Link includes a Bluetooth LE wireless communication protocol designed to work seamlessly with this app. PLX Devices sensor modules can be connected in a daisy-chain and the Multi Gauge Link is connected to the last sensor module in the chain to transmit sensor data to your smart phone for visual display. Compatible Hardware: Multi Gauge Link SM-PRO - Fluid Temp, Exhaust Gas Temp, Air Intake Temp, Fluid Pressure, Vac/Boost SM-AFR - Wideband Air/Fuel Ratio Sensor Module Compatible Hardware Combinations: SM-AFR + MultiGauge Link. SM-Vac/Boost + MultiGauge Link. SM-AFR + SM-Vac/Boost + MultiGauge Link. SM-PRO + SM-AFR + MultiGauge Link SM-PRO + MultiGauge Link SM-Pro is a combined sensor module for accurately measuring Vac/Boost, Exhaust Gas Temperature, Air Intake Temperature, Fluid (Oil/Water) Temperature, and Fluid Pressure. Includes genuine Honeywell 3Bar Vac/Boost sensor (built-in), wires/connectors for digital interface with DM-6, DM-100/200, MultiGauge Link. Also includes analog outputs for interfacing with 3rd party ECU's and data loggers. The SM-AFR Gen4 Sensor Module is a tuner grade Bosch LSU 4.9 wideband oxygen sensor controller with digital/analog outputs for 3rd interface. Accurately reads the air/fuel ratio of any internal combustion from 0.68 Lambda to 1.36 Lambda (10:1 - 20:1 AFR *Gasoline). Fully plug and play, no sensor calibration is required. Compatible with Gasoline, Diesel, Ethanol, Methanol, E85, LPG, CNG. Accurate to 0.1AFR with less than 100mS reaction time from rail to rail. Advanced sensor health monitoring, displays oxygen sensor health and reaction time when connected to DM-6 gauge or to your smartphone via the Multi Gauge Link interface. The SM-Vac/Boost Sensor Module accurately measures the vacuum pressure and boost pressure of any intake manifold. This is ideal for turbo and supercharged applications where monitoring the intake pressure is vital. The Vacuum / Boost Sensor Module can also be used as a stand alone unit capable of interfacing with 3rd party hardware where both the digital output and the analog output are available simultaneously. Its measurement range is 30.5 inHg to 30 PSI or 760 mmHg to 2.11 Kg/cm^2. Connect this sensor module via the Multi Gauge Link interface for a boost gauge on your smartphone. For more information visit www.plxdevices.com
Screenshots
Verdict
The clearest difference is rating: 123\Tune+ at 4.5 against MultiGauge's 1.0. 123\Tune+ also leads on review sentiment (58% vs 17%) and ratings volume (242 vs 4). MultiGauge's advantage is iOS requirement (12.1 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.
123\Tune+ holds the better App Store score, 4.5 against 1.0. That said, the two scores are not equally well evidenced: 123\Tune+ has 242 ratings behind it against 4, so its average is the more settled of the two. Written reviews point the same way: 58% of 123\Tune+'s written reviews are positive against 17% of MultiGauge's.
123\Tune+ ships an update every 3 weeks, MultiGauge fortnightly. The most recent releases landed on September 11, 2026 and June 11, 2026 respectively.
| Parameter | 123\Tune+ | MultiGauge |
|---|---|---|
| Price | Free | Free |
| Rating | 4.5 (242 ratings) — better | 1.0 (4 ratings) |
| Positive reviews | 58.3% of reviews — better | 16.7% of reviews |
| Number of ratings | 242 — better | 4 |
| Update frequency | Every 3 weeks | Fortnightly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad | iPhone, iPod |
| Requires iOS | 16.0 | 12.1 — better |
| Further details — not scored | ||
| Size | 209 MB | 10 MB |
| Age rating | 4+ | 4+ |
| Developer | Albertronic B.V. | PLX Devices, INC. |
Customer experience
123\Tune+
MultiGauge
In-app purchases
123\Tune+
No in-app purchases
MultiGauge
No in-app purchases
Questions
Is 123\Tune+ free?
Is MultiGauge free?
Which has better reviews, 123\Tune+ or MultiGauge?
Do 123\Tune+ or MultiGauge have ads?
Which is updated more often, 123\Tune+ or MultiGauge?
Other comparisons
