# ProdigiSign vs SPAI Vault

The clearest difference is in-app purchases: ProdigiSign at none against SPAI Vault's 3. ProdigiSign also leads on iOS requirement (12.0 vs 17.6). SPAI Vault's advantage is update cadence (every 6 days vs every 3 months). On price, ads and device support there is nothing between them.

Both are free to download. SPAI Vault sells 3 one-off in-app purchases. ProdigiSign asks for nothing beyond the download.

ProdigiSign ships an update every 3 months, SPAI Vault every 6 days. The most recent releases landed on November 4, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | ProdigiSign | SPAI Vault |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (4 ratings)](https://appshunter.io/ios/app/spai-vault-secure-docs/id6760571010/reviews)** |
| Number of ratings | — | **4** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 6 days** |
| Monetization | — | Free with in-app purchases |
| Size | 271 MB | 6 MB |
| Requires iOS | **12.0** | 17.6 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 17+ |
| Developer | [Prodigisign](https://appshunter.io/developer/1733593718) | [Sindhu Shekar Chandrashekar](https://appshunter.io/developer/1885073320) |

## What reviewers say

### ProdigiSign

[App page](https://appshunter.io/ios/app/prodigisign/id6670239890)

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

**In-app purchases:** none


### SPAI Vault

[App page](https://appshunter.io/ios/app/spai-vault-secure-docs/id6760571010)

Securely store and manage important personal documents like passports and IDs on your device. Scan documents quickly, set expiration reminders, and keep everything organized in one private place.

**Highlights:** Secure document vault, Scan documents in seconds, Expiration date reminders, Organize all documents in one place, Create family profiles, Fast document search

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Buy Us a Coffee | $1.99 | one-time |
| Support Development | $4.99 | one-time |
| Keep SPAI Vault Growing | $9.99 | one-time |


## Frequently asked questions

### Is ProdigiSign free?

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

### Is SPAI Vault free?

SPAI Vault is free to download, with in-app purchases available.

### Do ProdigiSign or SPAI Vault have ads?

Neither ProdigiSign nor SPAI Vault shows ads.

### Which is updated more often, ProdigiSign or SPAI Vault?

ProdigiSign ships an update every 3 months, and SPAI Vault every 6 days. Most recently, ProdigiSign was updated on November 4, 2026 and SPAI Vault on October 31, 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.*