ESigno vs iSmartDiag
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
ESigno
Easily sign documents from any device, anywhere. Send, receive, and sign contracts, proposals, and quotes instantly and legally within a minute.
- Sign documents instantly
- Send and receive documents
- Legally binding signatures
- Cross-device compatibility
- Sign contracts and proposals
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Signing documents wouldn't be a problem anymore! From any device and anywhere you can send, receive and sign documents within a minute 100% legally. ESigno is an application that gives you the power to sign contracts, proposals, quotes, and more instantly.
iSmartDiag
This app provides powerful automotive diagnostic functions for mechanics and DIYers. It connects via Bluetooth to scan and diagnose over 110 vehicle brands, offering detailed system analysis and maintenance functions. Save time and costs with real-time monitoring and comprehensive reports.
- 110+ vehicle brands coverage
- Full system scan & diagnosis
- Bi-directional control
- Read/erase fault codes
- Maintenance functions (e.g., service reset, EPB)
- Data stream graph display
- Bluetooth connectivity
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According to connect with mobile or tablet bluetooth, the iSmartDiag can work on vehicles properly and provide powerful diagnostic functions to mechanics. In addition, the iSmartDiag can help drivers, DIYers and workshops save plenty of time and costs. Main Features: 1. 110+ vehicle brands coverage with full system scan & diagnosis 2. Support latest CANFD& DoIP communication protocols diagnosis 3. Bi-directional control and easy pin-point faults 4. Support full system scan & diagnosis: engine, transmission, SRS, TPMS, ABS, ESP, IMMO and etc. 5. Full system basic diagnostic functions including read/erase fault code, read system information, freeze frame data, read data stream, active tests. 6. iSmartDiag510 covered 13 maintenance functions; iSmartDiag510Pro covered 28 maintenance function, like service reset, EPB, DPF, injector coding etc. 7. Data stream graph display and comparison 8. Support fault code emailing function to certain email address(This function is used to send diagnostic report email to drivers by workshop), diagnostic report and vehicle quick scan report. 9. Bluetooth connection based on mobile devices, efficiency connection distance within 10 meters. 10. Support one-touch diagnostic complaint. Welcome to the forefront of automotive diagnostic technology. Vident Tech offers state-of-the-art solutions based on OBD and OBDII. We are on par with renowned brands like Autel, Xtool, and Launch, providing you with accurate and reliable results for mileage checking, emission status, and engine diagnostics. Vident Tech aimed to deliver the best diagnostic solutions for mechanics. Whether it's routine maintenance or emergency situations, with outstanding performance and user-friendly interfaces, Vident products can help you quickly identify issues. Our advanced diagnostic tool, the iSmart Diag application, allows you to effortlessly access to vehicle data and generate comprehensive reports. Whether it's reading mileage, evaluating emissions, or diagnosing engine issues, iSmart Diag can meet your needs. By choosing Vident Tech, you'll receive dependable and precise solutions that enhance your driving experience. Don't missing the opportunity to experience Vident Tech's advanced diagnostic technology. We are your trusted partner in the field of automotive diagnostics. Let's explore the convenient features of iSmart Diag together and effortlessly resolve your car repair issues. Download the iSmart Diag application now and revolutionize the way you maintain and repair your car. iSmart Diag is an intelligent automotive diagnostic application that helps you monitor and address car problems in real-time, optimizing your driving experience. It offers comprehensive and accurate diagnostic functions, including reading and clearing fault codes, monitoring sensor data, and active tests. With precise diagnostic results, help to better understand vehicle status and take timely maintenance measures to avoid potential failures. It can monitor various parameters of your vehicle in real-time, such as speed, fuel consumption, assisting you in gaining a comprehensive understanding of your vehicle. Additionally, it provides real-time data charts and reports, enabling you to analyze your vehicle's operating conditions more clearly. The iSmart Diag interface is designed to be simple and intuitive, ensuring ease and convenience of operation. Which allows entry level users to perform automotive diagnostics and troubleshooting. Whether you're an automotive enthusiasts or drivers, you can easily get started with it. Vident Tech team will continuously updates and optimizes the application's features to provide better user experience and functional support. Additionally, we offer timely technical support and online help documentation to ensure that you receive the necessary assistance and guidance while using iSmart Diag.
Screenshots
Verdict
The clearest difference is rating: ESigno at 5.0 against iSmartDiag's 1.0. ESigno also leads on iOS requirement (11.0 vs 15.5). iSmartDiag's advantage is update cadence (every 4 days vs fortnightly). On price, ratings volume, ads and in-app purchases 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
ESigno holds the better App Store score, 5.0 against 1.0. Both are backed by a comparable volume of ratings — 1 and 2 respectively.
ESigno ships an update fortnightly, iSmartDiag every 4 days. Both last shipped on November 3, 2026.
| Parameter | ESigno | iSmartDiag |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | 1.0 (2 ratings) |
| Positive reviews | — | 25.0% of reviews |
| Number of ratings | 1 | 2 — better |
| Update frequency | Fortnightly | Every 4 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 11.0 — better | 15.5 |
| Further details — not scored | ||
| Size | 42 MB | 615 MB |
| Age rating | 4+ | 9+ |
| Developer | Seyyide Zeynep Gungur | Shenzhen Vident Technology Co., Ltd |
Customer experience
ESigno
iSmartDiag
In-app purchases
ESigno
No in-app purchases
iSmartDiag
No in-app purchases









