Comparison

Maintra vs Modbus 40001

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

Head to head
About

Maintra

Log vehicle maintenance, fuel, and costs with AI assistance. Track services, repairs, and parts, and receive smart reminders. Organize your entire vehicle history in one place.

Highlights
  • AI-powered service logging
  • Receipt scanning for data entry
  • Smart maintenance planning and reminders
  • Vehicle-aware AI assistant
  • Fuel consumption and cost tracking
  • Parts inventory and alerts
  • Multi-vehicle support
Features
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Maintra is the service book I wanted in my own garage: quick to update, clear about what is due, and easy to take with you. Keep the history that matters - services, repairs, fuel, parts, mileage, costs, and reminders - for every vehicle in one place. ADD RECORDS WITHOUT THE CHORES • Describe the work in plain words or photograph a service receipt. AI turns it into clean, editable records with parts, labor, notes and totals. Receipts can be multi-page and in any language; mark the job as DIY or workshop work. • Scan a fuel receipt or a clear pump display. Maintra reads the fill-up details; you review them and tap Save. • Photograph a VIN plate or registration document to fill vehicle details faster. KNOW WHAT NEEDS ATTENTION • Get a maintenance plan based on the vehicle, mileage, service history and issues you report. • Keep your own plan beside the AI plan. See overdue, urgent and upcoming work together, with reminders that do not hide the rest. • Ask the vehicle-aware AI assistant about symptoms, parts or what to check before a trip. It uses your car’s context to help you prepare, not pretend to replace a mechanic. FUEL, COSTS AND PLACES • Track consumption, price per unit, total spend and mileage. • Save workshops, fuel stations and individual addresses, rate each one and keep notes. No GPS or location permission. • See spending by category, month and vehicle, with multiple currencies. PARTS DO NOT DISAPPEAR IN THE GARAGE • Save future buys in Wishes, share the list, and get price-drop or back-in-stock alerts. • Mark a purchase as On the Shelf until it is fitted. • When you fit it, turn it into a service record without counting the cost twice. TYRES, SET BY SET • Keep every set you own, the one on the car and the ones in storage, with the swap history behind each. • Log tread corner by corner and see which tyre is going first and when rotation is due. • Maintra watches the date as well. Rubber past six years gets flagged even when the tread still looks fine. • Brand, size, DOT code, photos and the mileage each set has run. • Not sure how worn it really is? Photograph the tyre and get an AI read on its condition. YOUR GARAGE, YOUR WAY • Keep cars, motorcycles, vans, EVs and hybrids together. • Use the new Polaroid garage or switch back to the compact Classic List. • Light and dark themes, home-screen widgets and iOS Lock Screen widgets. • Works offline: changes save on your device first and sync later. PAPERS YOU ALWAYS NEED • Keep insurance, registration and the rest of the paperwork with the car it belongs to, all pages of it. • Add the expiry date and Maintra tells you before it runs out, not after. • Photograph them once and find them in seconds, at a roadside check or when the policy is up for renewal. BRING YOUR HISTORY. TAKE IT WITH YOU. • Import fuel logs from CSV exports or pasted notes. Review every row; duplicates are skipped. Import works offline. • Export a full JSON backup, per-vehicle CSV files for fuel or service records, and a PDF service history with receipts. Export is available on every tier. • Your records are yours. No ads. No location tracking. Start free with one vehicle and the core service book. Pro opens the garage for more vehicles and more AI; VIP adds the vehicle-aware AI assistant and the highest limits. EULA: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Terms: https://maintra.me/terms.html

About

Modbus 40001

Features
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Modbus 40001 is a Modbus/TCP master & slave for testing and commissioning industrial equipment — PLCs, drives, meters, and controllers — from an iPhone or iPad. Enter a device's IP address and port, choose a function code, and continuously poll a block of coils or registers of any size. Values update live, changed cells flash as they move, and holding registers and coils can be written back with a tap. FEATURES:- • Function codes 01–04 — Coil Status, Input Status, Holding Register, Input Register • Any block size — set the start address and length, checked against the protocol limits for each function • Poll rates from 100 ms to 5 seconds • Value notations — unsigned and signed decimal, hex, binary, 32-bit long, Float32 and 64-bit double in both word orders • Character notations — ASCII in either byte order, plus a low-byte form, with a joined readout so device names and serial numbers read as text • Writes — tap a cell to send Preset Single Register (06) or Force Single Coil (05) • Multiple scan documents — save several register blocks per device and switch between them • Addressing toggle — 1-based (PLC style) or 0-based (raw protocol), so off-by-one confusion is a single tap away from being resolved • Traffic view — every frame in and out as bracketed hex, with capture and clear • Status strip — polls, valid responses, errors, success rate, latency, and last update time • Built-in demo device — try every screen without hardware on the bench • Designed for both orientations — iPad keeps a two-column layout, iPhone scrolls the whole page No accounts, no analytics, no advertising. Device addresses and scan settings are stored only on your device. Intended for general testing of the Modbus/TCP protocol. Not certified for safety-critical use.

Screenshots

Maintra4 screens
Modbus 400012 screens

Verdict

The call

The clearest difference is in-app purchases: Modbus 40001 at none against Maintra's 2. Maintra's advantage is update cadence (fortnightly vs every 5 weeks). On price, ads, device support and iOS requirement 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. Maintra sells 2 in-app purchases, starting at $1.99 per month. Modbus 40001 asks for nothing beyond the download.

UpkeepUpdate frequency

Maintra ships an update fortnightly, Modbus 40001 every 5 weeks. The most recent releases landed on November 5, 2026 and October 16, 2026 respectively.

Scorecard2 real differences · 7 level
Maintra versus Modbus 40001: the parameters behind the verdict, then further details
ParameterMaintraModbus 40001
PriceFreeFree
Rating5.0 (1 ratings) — better—
Number of ratings1 — better—
Update frequencyFortnightly — betterEvery 5 weeks
AdsNoNo
In-app purchasesYesNo — better
MonetizationFreemium—
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS16.415.1 — better
Further details — not scored
Size70 MB58 MB
Age rating4+4+
DeveloperKyrylo RozbeikoPHILIP JULIAN ROBINSON

In-app purchases

2 purchases

Maintra

Subscriptions2
  • Maintra Pro$1.991 Month
  • Maintra VIP$7.991 Month
None

Modbus 40001

No in-app purchases

Questions

Is Maintra free?
Maintra is free to download, with in-app purchases available.
Is Modbus 40001 free?
Modbus 40001 is free to download, with no in-app purchases.
Do Maintra or Modbus 40001 have ads?
Neither Maintra nor Modbus 40001 shows ads.
Which is updated more often, Maintra or Modbus 40001?
Maintra ships an update fortnightly, and Modbus 40001 every 5 weeks. Most recently, Maintra was updated on November 5, 2026 and Modbus 40001 on October 16, 2026.

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