# GOOLOO OBD vs Signature Maker

The clearest difference is rating: Signature Maker at 4.0 against GOOLOO OBD's 3.0. GOOLOO OBD's advantage is monetization model (free with in-app purchases vs subscription) and iOS requirement (15.0 vs 17.6). On price, ratings volume, update cadence and ads there is nothing between them.

Both are free to download. GOOLOO OBD sells 10 in-app purchases, starting at $4.99 per month and Signature Maker sells 2 in-app purchases, starting at $7.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Signature Maker holds the better App Store score, 4.0 against 3.0. Both are backed by a comparable volume of ratings — 2 and 2 respectively.

GOOLOO OBD ships an update every 3 months, Signature Maker every 4 months. Both last shipped on November 5, 2026.

## The numbers

| Metric | GOOLOO OBD | Signature Maker |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.0 (2 ratings)](https://appshunter.io/ios/app/gooloo-obd/id6747735228/reviews) | **[4.0 (2 ratings)](https://appshunter.io/ios/app/signature-maker-signify/id6747852510/reviews)** |
| Number of ratings | 2 | 2 |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 4 months |
| Monetization | **Free with in-app purchases** | Subscription |
| Size | 3.1 GB | 19 MB |
| Requires iOS | **15.0** | 17.6 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Changsha Angsi E-commerce Co., Ltd.](https://appshunter.io/developer/1797024413) | [Nicolas Gustavo Melian](https://appshunter.io/developer/1777868675) |

## What reviewers say

### GOOLOO OBD

[App page](https://appshunter.io/ios/app/gooloo-obd/id6747735228)

Transform your phone into a powerful car diagnostic tool. Access full system and OBD2 functions, perform maintenance services, and get detailed repair data. Connects wirelessly via Bluetooth for easy vehicle identification and reporting.

**Highlights:** Full System Diagnosis, Full OBD2 Functions, 6 Special Maintenance Functions, Repair Data Library, AutoVIN Vehicle Identification, Wireless Bluetooth 5.0 Connection, Diagnostic Report Generation

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

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Auto-renewal | $4.99 | per month |
| Annual Auto-renewal | $29.99 | per year |
| Renault Gateway 5 Tokens | $147.99 | one-time |
| Nissan Gateway 5 Tokens (EU only) | $147.99 | one-time |
| FCA Gateway 1-year Access (EU only) | $229.99 | one-time |
| VW SFD Gateway 1-year Access | $229.99 | one-time |
| Renault Gateway 10 Tokens | $254.99 | one-time |
| Nissan Gateway 10 Tokens (EU only) | $254.99 | one-time |
| Renault Gateway 20 Tokens | $464.99 | one-time |
| Nissan Gateway 20 Tokens (EU only) | $464.99 | one-time |


### Signature Maker

[App page](https://appshunter.io/ios/app/signature-maker-signify/id6747852510)

Create professional digital signatures quickly using AI or by drawing. Sign PDFs seamlessly, remove backgrounds, and store multiple signatures. Ideal for professionals needing to sign documents efficiently.

**Highlights:** AI-powered signature generation, Hand drawing signature creation, Font-based signature styles, Seamless PDF document signing, Automatic background removal, Transparent PNG downloads, Multiple signature storage

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Plan | $7.99 | per 7 days |
| Yearly Plan | $34.99 | per year |


## Frequently asked questions

### Is GOOLOO OBD free?

GOOLOO OBD is free to download, with in-app purchases available.

### Is Signature Maker free?

Signature Maker is free to download, with in-app purchases available.

### Which has better reviews, GOOLOO OBD or Signature Maker?

Signature Maker is rated higher. GOOLOO OBD averages 3.0 out of 5 from 2 ratings, while Signature Maker averages 4.0 from 2 ratings.

### Do GOOLOO OBD or Signature Maker have ads?

Neither GOOLOO OBD nor Signature Maker shows ads.

### Which is updated more often, GOOLOO OBD or Signature Maker?

GOOLOO OBD ships an update every 3 months, and Signature Maker every 4 months. Most recently, GOOLOO OBD was updated on November 5, 2026 and Signature Maker on November 5, 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.*