# Plumbline Studio vs Auto Maintenance Fuel Diary

The clearest difference is update cadence: Plumbline Studio at every 10 days against Auto Maintenance Fuel Diary's monthly. Plumbline Studio also leads on price ($0.99 vs $1.99). Auto Maintenance Fuel Diary's advantage is iOS requirement (13.0 vs 17.0). On ads, in-app purchases and device support there is nothing between them.

Plumbline Studio costs $0.99 and Auto Maintenance Fuel Diary $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Plumbline Studio ships an update every 10 days, Auto Maintenance Fuel Diary monthly. The most recent releases landed on October 31, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | Plumbline Studio | Auto Maintenance Fuel Diary |
| --- | --- | --- |
| Price | **$0.99** | $1.99 |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 10 days** | Monthly |
| Monetization | — | Paid |
| Size | 3 MB | 30 MB |
| Requires iOS | 17.0 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Robert Corbin](https://appshunter.io/developer/1890247992) | [Xiamen City Fanyou Network Technology Co., Ltd.](https://appshunter.io/developer/1842524161) |

## What reviewers say

### Plumbline Studio

[App page](https://appshunter.io/ios/app/plumbline-studio-level-tool/id6771016320)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### Auto Maintenance Fuel Diary

[App page](https://appshunter.io/ios/app/auto-maintenance-fuel-diary/id6772425311)

Easily track all your vehicle maintenance and fuel expenses in one place. Log services, fill-ups, and mileage to monitor spending and fuel economy. Supports multiple vehicles and offers offline access to your data.

**Highlights:** Service log for oil, tires, brakes, and more, Fuel tracker with MPG/L/100km stats, Multi-vehicle garage management, Expense charts (weekly, monthly, yearly), Mileage reminders and cost summaries, Offline-first data storage

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Plumbline Studio free?

Plumbline Studio costs $0.99, with no in-app purchases.

### Is Auto Maintenance Fuel Diary free?

Auto Maintenance Fuel Diary costs $1.99, with no in-app purchases.

### Do Plumbline Studio or Auto Maintenance Fuel Diary have ads?

Neither Plumbline Studio nor Auto Maintenance Fuel Diary shows ads.

### Which is updated more often, Plumbline Studio or Auto Maintenance Fuel Diary?

Plumbline Studio ships an update every 10 days, and Auto Maintenance Fuel Diary monthly. Most recently, Plumbline Studio was updated on October 31, 2026 and Auto Maintenance Fuel Diary on October 28, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*