Why the choice matters more than it looks
Every motorhome levelling app claims to get you level. The question is what happens between opening the app and driving onto your ramps. Does it tell you how many steps to place under which wheel — before you move? Does it measure both roll and pitch at once, so you plan a single drive-on rather than fix one axis and discover the other? Does it know the motorhome way of doing things, where you drive onto ramps instead of hitching and adjusting?
Most apps answer none of these questions. They show you an angle reading and leave the rest to you. This guide is a framework for evaluating what you're actually buying — so you can tell the difference before you're at a campsite, wondering why you're still not level after three trips on and off the ramps.
The 9 features to evaluate
Feature 01
Sensor type — phone or external hardware?
The most fundamental split in the market. A phone-based app uses the accelerometer already built into your device. An external sensor (SavvyLevel, AdventurousBD Possum and similar) mounts permanently to the chassis and connects via Bluetooth.
Hardware sensors are always-on once installed — you get a reading the moment you pull up without placing your phone anywhere specific. That's their genuine advantage. The accuracy concern often raised about phone sensors applies to dynamic applications like navigation. On a stationary motorhome, your phone measures a static gravity field. Modern smartphones achieve better than 0.5° accuracy in that scenario — well inside the ±3° tolerance most motorhome appliances require.
The practical difference is cost. External sensors run $190–$350+ AUD before installation. A phone-based app is free to try.
Feature 02
Ramp step calculator
Showing you a live degree reading is one thing. Telling you how many ramp steps to place under which wheel — before you move the vehicle — is another. These are different problems that require different software.
A ramp step calculator takes your current lean, your track width, and your ramp's step height and outputs an exact number of steps per wheel. Without one, you're converting degrees to millimetres to steps in your head and adjusting after the fact if you guessed wrong. Most apps skip this entirely. Check before you commit.
Feature 03
Dual-axis simultaneous levelling
A motorhome leans in two directions at once — roll (side to side) and pitch (front to back). An app that shows you only one axis, or one at a time, forces you to fix the lean, drive on, then discover you're still nose-down and start again.
An app that reads both axes simultaneously lets you plan the whole correction in a single pass. You see exactly which wheels need raising and by how much, place all your ramps, and drive on once. That single correct drive-on — measured on the natural ground before you move — is the entire point. Iterating on and off the ramps is the thing a good app removes.
Feature 04
Motorhome-specific workflow
A motorhome is not levelled the same way as a caravan, and an app designed for one doesn't necessarily understand the other. A caravan app expects you to level side-lean while hitched, unhitch, then correct pitch with the jockey wheel. A motorhome has no jockey wheel and no unhitch step — you measure on the ground in your final position, place ramps under the low wheels, and drive on in one pass.
A generic level app or a caravan app doesn't reflect that. You get an angle reading aimed at the wrong sequence. An app built for motorhomes measures both axes on natural ground, tells you which wheels to ramp and by how much, and guides the drive-on.
Feature 05
Multi-ramp layout for different heights
When more than one wheel needs raising — and each needs a different height — the ramps have to be offset along the direction of travel so every wheel arrives at its target step at the same moment, in a single forward pass. Get the offset wrong and you'll have one wheel up its ramp while another is still climbing.
A capable app calculates this for you: which wheel gets how many steps, and where to position each ramp so a single drive-on lands everything at once. In practice you never need more than three ramps. An app that simply reports the angle leaves this geometry to you.
Feature 06
Slideout seal protection
If your motorhome has a slideout, perfectly level isn't actually ideal. Water pooling against the slideout's rubber seals accelerates wear and eventually leaks — an expensive repair. The fix is to bias the slideout side a few millimetres lower than dead level, within appliance tolerance, so water drains away from the seals rather than towards them.
Almost no levelling app accounts for this. A motorhome-aware app lets you set Left, Off, or Right to match your rig's layout (it should handle both LHD and RHD slideouts) and bakes the bias into its target. A minor setting with a significant long-term consequence.
Feature 07
Solo levelling — audio guidance and remote display
If you travel with a partner, the division of labour is easy — one drives, one watches the level. If you travel solo, you need to drive onto ramps and know when you've hit your target without a spotter inside.
Two solutions exist. Audio guidance produces a rising tone that increases in frequency as you approach level, with a single beep when you arrive — you hear it through the window while driving, no spotter required. A remote display streams a live reading to a second phone in the cab while the sensor phone sits in the habitat. Most apps offer one or the other, if either.
OzLevel Pro includes both — hands-free audio guidance, and Pair Mode, which streams live sensor readings between two phones in real time. It works across iPhone and Android combinations with no extra hardware and no Bluetooth sensor.
Feature 08
Offline capability and install friction
A significant proportion of Australian motorhoming happens at free camps — national parks, state forests, station stays, roadside stops — where mobile coverage is absent or unreliable. An app that needs a data connection at the campsite fails exactly when you need it most.
A Progressive Web App (PWA) loads once and caches everything on device, then works with no signal. It also sidesteps the App Store entirely: no large download on patchy signal, no install before you can use it — you open it in a browser on any device. App Store apps may work offline for basic angle readings but can require connectivity for accounts, premium content, or updates. Verify the offline behaviour before heading somewhere remote.
Feature 09
Pricing model
The pricing models in this market vary considerably, and the upfront cost doesn't tell the full story:
- Hardware + companion app: $190–$350+ AUD hardware cost, plus installation. The app itself is usually free.
- Subscription Pro tier: free basic app, monthly or annual fee for advanced features. Cost accumulates over years of travelling.
- One-time Pro upgrade: free basic app, single payment for full feature access. No ongoing cost.
- Fully free: rare, and usually limited to a basic angle display.
If you're comparing two apps with similar features and one charges annually while the other charges once, that's a meaningful difference over a decade on the road. Factor in the total cost of ownership, not just the download price.
Feature comparison at a glance
How the main options in the Australian market compare across these features:
| Feature | OzLevel | Generic Level App | Caravan-focused App | Hardware Sensor |
|---|---|---|---|---|
| Sensor type | Phone (built-in) | Phone (built-in) | Phone (built-in) | External Bluetooth |
| Ramp step calculator | ✓ Pro | ✗ | Varies | Varies |
| Dual-axis simultaneous | ✓ Pro | ✗ | ✗ | Varies |
| Motorhome workflow | ✓ | ✗ | ✗ | ✗ |
| Multi-ramp layout | ✓ Pro | ✗ | ✗ | ✗ |
| Slideout seal protection | ✓ Pro | ✗ | ✗ | ✗ |
| Solo audio guidance | ✓ Pro | ✗ | ✗ | ✗ |
| Two-person / remote display | ✓ Pro | ✗ | ✗ | Always-on sensor |
| 100% offline | ✓ | ✓ | ✓ | ✓ |
| No App Store required | ✓ | ✗ | ✗ | ✗ |
| Australian-made | ✓ | ✗ | Varies | Varies |
| Cost | Free · Pro $9.99 once | Free | Free / Paid | $190–$350+ AUD |
A note on phone accuracy
The question comes up constantly: is a phone accurate enough? For a stationary motorhome on a campsite, the answer is yes — comfortably.
Your phone's accelerometer measures gravity. On a parked vehicle with no motion or vibration, it produces a static reading with no meaningful drift. The sensor concerns raised by hardware vendors apply to dynamic use cases — navigation, motion tracking — not a vehicle that isn't moving.
Most motorhome fridges, appliances, and water systems operate correctly within ±3° of level. A modern smartphone achieves better than 0.5° on a static reading. That's six times more precise than you actually need. If your phone says you're within 1–2°, your fridge is running correctly and you are done.
Your pre-download checklist
Before committing to any motorhome levelling app, run through these questions:
- Does it have a ramp step calculator — or just an angle display?
- Does it read roll and pitch simultaneously, for a single drive-on?
- Is the workflow built for motorhomes, not caravans or generic levelling?
- Does it lay out multiple ramps when wheels need different heights?
- If you have a slideout, does it offer seal-protection bias?
- Can I use it solo — audio guidance, a remote display, or both?
- Does it work 100% offline with no mobile signal?
- Does it run on my phone — no App Store download required?
- What does Pro cost, and is it a one-time payment or a subscription?
Any app that can't answer most of these clearly is a spirit level dressed up as something more. The campsite is the wrong place to find out.
Frequently asked questions
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Do I need a Bluetooth sensor or will my phone work for motorhome levelling?
Your phone works. Modern smartphones measure tilt to better than 0.5° on a stationary vehicle — six times more precise than the ±3° tolerance most motorhome appliances require. Hardware sensors ($190–$350+ AUD) are always-on once mounted, which is their main practical advantage. For most motorhomers, a phone-based app delivers the same result at zero hardware cost.
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What's the difference between a spirit level app and a motorhome levelling app?
A spirit level app shows you a live angle reading. A motorhome levelling app uses that reading to calculate what to do about it — how many ramp steps under which wheels, measuring roll and pitch at once so you plan a single drive-on. The first tells you what is wrong. The second tells you how to fix it in one pass.
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Can a motorhome levelling app work without internet?
It depends on the app. OzLevel is a Progressive Web App that caches everything on device after the first load — it works 100% offline with no mobile signal. Most App Store levelling apps also work offline for basic angle readings, but may require connectivity for account features or updates. Always verify before heading somewhere remote.
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Does it matter whether a levelling app is designed specifically for motorhomes?
Yes — significantly. A motorhome levels differently to a caravan. You drive onto ramps rather than hitch and adjust, you measure both axes at once on natural ground before moving, and you may have a slideout that needs a few millimetres of bias to protect its seals. A generic level app or caravan app doesn't know any of this. An app built for motorhomes guides the drive-on with the right measurement for each wheel.