Comparison

ST25DV vs ContactsAI

Price, ratings, monetisation and update history for both apps, side by side โ€” with what reviewers say about each.

Head to head
About

ST25DV

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The ST25DV-I2C CryptoDemo iOS application shows how to establish a secure transfer channel over NFC, between an STM32 microcontroller and an iOS smartphone using coreNFC framework. It uses the fast transfer mode (FTM) feature of the ST25DV-I2C NFC Tag. An ST25DV-I2C-DISCO board is required to run the demonstration. This demonstration establishes a secure transfer channel by using cryptography to perform mutual authentication and to encrypt the communications over NFC. This secure transfer channel is used during the demonstration to securely send and retrieve data, perform the device settings, and upload new firmware. Only the granted user may communicate with the STM32 microcontroller to perform these operations. All the communications are encrypted between the microcontroller and the iOS phone in both ways, so that the user can configure the product or retrieve data securely. FEATURES : - Use the new NFC core feature of iOS 13, supporting the read an write of NFC for ISO15693 tag protocol. - Encryption of all NFC bidirectional communications between an iOS Phone and an STM32 microcontroller Fast communications over NFC, using ST25DV fast transfer mode - AES and ECC cryptography - Mutual authentication between the iOS phone and the STM32 microcontroller - Establishment of a unique AES session key - Encryption can be used to retrieve data, set device settings or update the firmware securely

About

ContactsAI

Features
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ContactsAI reimagines how you save and find contacts. Instead of typing field by field, just describe the person โ€” in text, by voice, or by scanning their business card โ€” and Apple Intelligence does the rest, entirely on your device. **CAPTURE CONTACTS NATURALLY** Type a sentence like "Sarah Lee, product designer at Verve Studio, sarah@verve.io" and ContactsAI instantly extracts a full contact card โ€” name, phone, email, job title, company, hometown, where you met, and more. No form-filling. No tapping through fields. **VOICE INPUT** Enable the microphone and speak contact details naturally. ContactsAI transcribes and extracts everything on-device using Speech Recognition. **BUSINESS CARD SCANNER** Point your camera at any business card. ContactsAI auto-captures once it detects enough text and builds the contact card for you. Or pick a card photo from your library. **NATURAL LANGUAGE SEARCH** Forget scrolling through hundreds of names. Search the way you think: โ€ข "Who did I meet in Paris?" โ€ข "Find all Designers" โ€ข "Show contacts from Acme" **ORGANIZE WITH GROUPS** Create custom contact groups with your choice of name, color, and icon. Assign contacts to multiple groups. Manage memberships from any contact detail screen. **APPLE CONTACTS SYNC** Optionally sync with your existing Apple Contacts. All locally added contacts are always available โ€” even without sync enabled. **100% ON-DEVICE AI** Every bit of AI processing โ€” extraction, classification, search โ€” runs locally using Apple Intelligence Foundation Models. Your contacts are never sent to any external server. Ever. --- **REQUIREMENTS** โ€ข iPhone 15 Pro or later โ€ข iOS 26 or later โ€ข Apple Intelligence enabled

Screenshots

ST25DV4 screens
ContactsAI4 screens

Verdict

The call

The clearest difference is iOS requirement: ST25DV at 13.4 against ContactsAI's 26.0. On price, ads, in-app purchases and device support there is nothing between them.

Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS

CostPrice ยท In-app purchases ยท Ads ยท Monetization

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

Scorecard1 real difference ยท 5 level
ST25DV versus ContactsAI: the parameters behind the verdict, then further details
ParameterST25DVContactsAI
PriceFreeFree
Update frequencyโ€”Every 3 weeks
AdsNoNo
In-app purchasesNoNo
DevicesiPhone, iPodiPhone, iPad
Requires iOS13.4 โ€” better26.0
Further details โ€” not scored
Size22 MB9 MB
Age rating4+4+
DeveloperSTMicroelectronicsKhurram Awan

In-app purchases

None

ST25DV

No in-app purchases

None

ContactsAI

No in-app purchases

Questions

Is ST25DV free?
ST25DV is free to download, with no in-app purchases.
Is ContactsAI free?
ContactsAI is free to download, with no in-app purchases.
Do ST25DV or ContactsAI have ads?
Neither ST25DV nor ContactsAI shows ads.

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