# Oz Optimizer vs Left

The clearest difference is ratings volume: Oz Optimizer at 21 against Left's 1. Oz Optimizer also leads on iOS requirement (16.0 vs 18.0). On price, rating, update cadence and ads there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

On the App Store both sit at effectively the same score — 5.0 for Oz Optimizer against 5.0 for Left. That said, the two scores are not equally well evidenced: Oz Optimizer has 21 ratings behind it against 1, so its average is the more settled of the two.

Both ship on a similar rhythm, roughly every 2 weeks. The most recent releases landed on October 8, 2026 and September 24, 2026 respectively.

## The numbers

| Metric | Oz Optimizer | Left |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (21 ratings)](https://appshunter.io/ios/app/oz-optimizer/id6476157330/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/left-envelope-budget-tracker/id6768726066/reviews) |
| Number of ratings | **21** | 1 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 weeks | Every 2 weeks |
| Monetization | Free | Free |
| Size | 26 MB | 3 MB |
| Requires iOS | **16.0** | 18.0 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Oz Optimizer, Inc.](https://appshunter.io/developer/1726024379) | [Koodalabs LLC](https://appshunter.io/developer/1684803962) |

## What reviewers say

### Oz Optimizer

[App page](https://appshunter.io/ios/app/oz-optimizer/id6476157330)

This app helps you optimize your financial plan and track your progress in real-time. It provides tools to manage your finances effectively and stay on top of your financial goals.

**Highlights:** Financial plan optimization, Real-time progress tracking, Cash flow management, Financial goal monitoring

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

**In-app purchases:** none


### Left

[App page](https://appshunter.io/ios/app/left-envelope-budget-tracker/id6768726066)

This app simplifies daily budgeting by focusing on a single number: what's left to spend after setting aside essential bills. It offers a minimalist approach to personal finance, ideal for those overwhelmed by complex budgeting tools.

**Highlights:** Single daily spending number, Envelope for big bills, Customizable spending periods, Minimalist interface, No bank syncing, No categories

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

**In-app purchases:** none


## Frequently asked questions

### Is Oz Optimizer free?

Oz Optimizer is free to download, with no in-app purchases.

### Is Left free?

Left is free to download, with no in-app purchases.

### Which has better reviews, Oz Optimizer or Left?

Oz Optimizer and Left are both rated 5.0 out of 5 on the App Store, from 21 and 1 ratings respectively.

### Do Oz Optimizer or Left have ads?

Neither Oz Optimizer nor Left shows ads.

### Which is updated more often, Oz Optimizer or Left?

Oz Optimizer ships an update every 2 weeks, and Left every 2 weeks. Most recently, Oz Optimizer was updated on October 8, 2026 and Left on September 24, 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.*