# Otrack Invoice vs SG Proof

The clearest difference is update cadence: SG Proof at monthly against Otrack Invoice's every 3 months. On price, ads, in-app purchases and device support there is nothing between them.

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

Otrack Invoice ships an update every 3 months, SG Proof monthly. The most recent releases landed on October 9, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | Otrack Invoice | SG Proof |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[2.2 (125 ratings)](https://appshunter.io/ios/app/sg-proof/id6443609412/reviews)** |
| Number of ratings | — | **125** |
| Positive reviews | — | 15.6% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Monthly** |
| Monetization | — | Free |
| Size | 118 MB | 58 MB |
| Requires iOS | 15.6 | **15.1** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Otrack Inc](https://appshunter.io/developer/1495591605) | [SGWS](https://appshunter.io/developer/1647645198) |

## What reviewers say

### Otrack Invoice

[App page](https://appshunter.io/ios/app/otrack-invoice/id1502871573)

**Features:** Apple Wallet

**In-app purchases:** none


### SG Proof

[App page](https://appshunter.io/ios/app/sg-proof/id6443609412)

Streamline your business inventory management with advanced ordering tools. Discover new products, reorder favorites easily, and stay updated with industry trends. This app offers on-the-go technology for efficient mobile ordering and restocking.

**Highlights:** Barcode scanning for item search, Persistent login for quick access, Unified shopping cart across devices, Reorder saved items, Discover new deals and products

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

**In-app purchases:** none

**What reviewers like**

- 👍 Website and apps not crashing as often (post-July 4th update)
- 👍 New update made a huge difference (night and day)
- 👍 App loads faster and has a nicer interface (post-new update)
- 👍 Gets the job done
- 👍 Amazing (works great)

**What reviewers complain about**

- 🐛 Cannot open Support tickets via app
- 🐛 Items not showing actual final price in cart
- 🐛 Individual bottle final price not shown
- 🐛 App crashes frequently
- 🐛 Error codes when searching for products

**Reported bugs**

- Cannot open Support tickets via app
- Items not showing actual final price in cart
- Individual bottle final price not shown
- App crashes frequently
- Error codes when searching for products

**Requested features**

- Fix the back button issue
- Show actual final price for individual bottles
- Fix the pop-up deals not disappearing automatically


## Frequently asked questions

### Is Otrack Invoice free?

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

### Is SG Proof free?

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

### Do Otrack Invoice or SG Proof have ads?

Neither Otrack Invoice nor SG Proof shows ads.

### Which is updated more often, Otrack Invoice or SG Proof?

Otrack Invoice ships an update every 3 months, and SG Proof monthly. Most recently, Otrack Invoice was updated on October 9, 2026 and SG Proof on October 15, 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.*