Zerolight Steps vs Devim GPS
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Zerolight Steps
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Zerolight Steps App, is prepared to connect and make parameter settings of DMX/SPI Buttoned or censored Stair LEDs Controller, produced by Bafa Elektronik via Bluetooth. Main settings are; Pixel Count, Button Structure and Button Functions, LED Flow Meltdown and Speed Settings.
Devim GPS
This app measures vehicle acceleration and distance using your iPhone's GPS or an OBD-II adapter. Analyze detailed run data, compare performance, and organize results by vehicle. An Apple Watch companion app is also included.
- 0-60 mph and custom speed range timing
- Distance measurement (1/4 mile, 1 mile, etc.)
- Automatic standing-start detection
- GPS and BLE OBD-II adapter support
- Detailed run analysis (graphs, splits, G-force)
- Apple Watch companion app
- Vehicle profile organization
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Devim GPS is an enthusiast-built GPS speedometer and performance timer for drivers who want to understand a run, not just save a number. Measure acceleration or distance with your iPhone, inspect the data behind the result, and compare runs with the context that matters. No account or adapter is required to start. MEASURE SPEED AND DISTANCE • Time 0–60 mph, 0–100 km/h, 100–200 km/h, or any custom speed range. • Measure 60 ft, 1/8 mile, 1/4 mile, 1/2 mile, 1 mile, or a custom distance. • Automatic standing-start detection waits for confirmed movement. • Use iPhone GPS on its own or connect a compatible BLE OBD-II adapter. • Hear spoken speed-threshold announcements and follow live speed in metric or imperial units. UNDERSTAND EVERY RUN • Review speed graphs, splits, slope, altitude, G-force, route, and indicators that help you judge the result. • See the timing method, sample rates, signal context, and other evidence behind the time. • Organize results by vehicle and add photos and notes. • Build a clean share card and decide whether to include the graph, speed splits, or location. IPHONE AND APPLE WATCH • The Apple Watch companion is included at no extra cost. • Follow live speed, measurement state, distance progress, trip statistics, and recent results from your wrist. • Away from the iPhone, Apple Watch GPS works as a standalone speedometer. Recording or saving a measurement requires the connected iPhone with Devim GPS open. DEVIM GPS PRO Devim GPS Pro is a one-time purchase. Its core Pro features remain unlocked: GPS + OBD analysis, multiple garage vehicles, side-by-side run comparison, measurement CSV export, and unlimited saved runs. Weather, wind, and other online Pro features are included for two years from the purchase date where services are available. OBD compatibility depends on the vehicle and adapter; a compatible BLE adapter using ELM327-style commands is required. PRIVATE BY DEFAULT No account is required. Saved runs stay on your device unless you choose to share or export them. Optional analytics is off by default. GPS and OBD readings can vary with signal, device, vehicle, adapter, phone position, slope, and conditions. Devim GPS is not certified timing equipment. Configure the app while parked, secure the phone, and perform tests only in safe, legal, closed-course environments. Never operate the app while driving.
Screenshots
Verdict
The clearest difference is in-app purchases: Zerolight Steps at none against Devim GPS's 1. Zerolight Steps also leads on iOS requirement (15.0 vs 17.2). Devim GPS's advantage is update cadence (every 4 weeks vs every 6 months). On price, ads 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. Devim GPS sells 1 one-off in-app purchase. Zerolight Steps asks for nothing beyond the download.
Zerolight Steps ships an update every 6 months, Devim GPS every 4 weeks. The most recent releases landed on September 23, 2026 and September 9, 2026 respectively.
| Parameter | Zerolight Steps | Devim GPS |
|---|---|---|
| Price | Free | Free |
| Rating | — | 3.0 (1 ratings) — better |
| Positive reviews | — | 0.0% of reviews |
| Number of ratings | — | 1 — better |
| Update frequency | Every 6 months | Every 4 weeks — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | — | Free with in-app purchases |
| Devices | iPhone, iPad, iPod — better | iPhone, Apple Watch |
| Requires iOS | 15.0 — better | 17.2 |
| Further details — not scored | ||
| Size | 99 MB | 27 MB |
| Age rating | 4+ | 4+ |
| Developer | Burckaan Gurgun | KEMAL UTKU LEKESIZ |
In-app purchases
Zerolight Steps
No in-app purchases
Devim GPS
- Devim GPS Pro$9.99
Questions
Is Zerolight Steps free?
Is Devim GPS free?
Do Zerolight Steps or Devim GPS have ads?
Which is updated more often, Zerolight Steps or Devim GPS?
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