Comparison

Simarine Connect vs FlatPad

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Simarine Connect

Features
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Keep a close eye on your levels with Simarine Connect, the dedicated companion app for Simarine Bluetooth-enabled tank sensors. Designed for simplicity and reliability, this app turns your smartphone into a digital gauge for your boat, camper, or caravan. Current Features: • Real-time level tracking for fresh water, grey water, black water, and fuel. • Wireless convenience via Bluetooth Low Energy (BLE). • Intuitive visuals for easy-to-read percentages and volume. • Multi-sensor support to manage multiple tanks in one app. Simple. Reliable. Smart. Simarine Connect is built for users who need a straightforward way to manage their tanks. By leveraging precise sensor data and a clean interface, you can plan your trips with confidence.

About

FlatPad

Features
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No ads. No subscription. No gadget to buy. Set your phone in the rig, see which corner is low and how much to raise — then get on with your day. Most leveling apps bury the answer under a wall of decimals — or a banner ad. FlatPad shows a top-down footprint of your RV, pools shade toward the corner that's low, and saves strong color for one thing: the instant all four corners sit level. NO ADS. NO SUBSCRIPTION. NO HARDWARE. • No banner ads — not even in the free version • No subscription — leveling is infrequent, so you pay once or not at all • No $150 Bluetooth box to mount and pair — your phone already has the sensors • Runs entirely on-device — no account, no sign-in ONE CLEAR THING ON SCREEN • A top-down plan of your trailer — the bubble drifts to the high side, a raise badge points at the low corner • Not a single number to parse • Set the phone down either way; the rig image rotates to match • Turns green the moment you're level ACCURATE CALIBRATION — FREE Every phone rests a hair off-flat because of the camera bump. FlatPad's two-read flip method measures that lean and subtracts it, so your readings are true — not off by a degree. It's the accuracy feature rivals gate behind a paywall. Here it's free. • Two quick reads, spun 180° — takes about 20 seconds • Works on any flat surface; it needn't be level • Haptic confirmation when each read lands BLOCK-HEIGHT MATH See exactly how much to raise each corner, in inches or centimeters. Heights are worked out from your rig's footprint, so calibration ends with a quick optional step to set it — and if you skip it, FlatPad tells you which default it's using instead of quietly guessing. A RIG FOR EACH RV Got more than one? Save a rig for each — its leveling method, its size, and a name you'll recognize — then pick the one you're parked in from the Visual or Audio tab. No re-entering dimensions every time you swap vehicles. • Each rig remembers its own leveling method and footprint • Switch in one tap, right where you're leveling • Name them anything — "Airstream", "the toy hauler", "Dad's fifth wheel" • One rig is free; keeping a library of them is Pro EVERYTHING YOU NEED TO LEVEL IS FREE Visual leveling, flip-method calibration, and block-height math never cost a thing — and never show an ad. FLATPAD PRO — $9.99 ONCE, NOT A SUBSCRIPTION Pro matches gear that costs $150 in hardware. One lifetime unlock, shared across all your devices: • Voice guidance — FlatPad speaks each move ("raise rear left, about an inch and a half") and waits until the rig settles before it talks again. Level from the jack stands without ever looking at the screen. • Apple Watch companion — set the phone in the rig and walk to the jack; your wrist shows the corner to raise and how much, turning green the instant you're level. No extra hardware to buy. • More leveling modes — level-by-side for paired jacks, and a stabilizer-only mode that squares you side-to-side first, then the front jack (independent-corner leveling is free) • A rig for every RV — save each vehicle's leveling method and size, and switch between them as you park (one rig is free) • Manual dark & light theme override Park it. Glance. Level.

Screenshots

Simarine Connect3 screens
FlatPad4 screens

Verdict

The call

The clearest difference is in-app purchases: Simarine Connect at none against FlatPad's 1. Simarine Connect also leads on iOS requirement (13.0 vs 17.0). On price, update cadence, 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. FlatPad sells 1 one-off in-app purchase. Simarine Connect asks for nothing beyond the download.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 3 weeks. The most recent releases landed on October 24, 2026 and October 6, 2026 respectively.

Scorecard2 real differences · 4 level
Simarine Connect versus FlatPad: the parameters behind the verdict, then further details
ParameterSimarine ConnectFlatPad
PriceFreeFree
Update frequencyEvery 3 weeksEvery 3 weeks
AdsNoNo
In-app purchasesNo — betterYes
DevicesiPhone, iPodiPhone, Apple Watch
Requires iOS13.0 — better17.0
Further details — not scored
Size94 MB4 MB
Age rating4+4+
DeveloperSIMARINESteve Smith

In-app purchases

None

Simarine Connect

No in-app purchases

1 purchases

FlatPad

One-time1
  • FlatPad Pro$9.99

Questions

Is Simarine Connect free?
Simarine Connect is free to download, with no in-app purchases.
Is FlatPad free?
FlatPad is free to download, with in-app purchases available.
Do Simarine Connect or FlatPad have ads?
Neither Simarine Connect nor FlatPad shows ads.
Which is updated more often, Simarine Connect or FlatPad?
Simarine Connect ships an update every 3 weeks, and FlatPad every 3 weeks. Most recently, Simarine Connect was updated on October 24, 2026 and FlatPad on October 6, 2026.

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