# deepFormula vs VoicePDF

The clearest difference is update cadence: VoicePDF at every 2 days against deepFormula's every 2 months. deepFormula's advantage is iOS requirement (15.0 vs 18.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. deepFormula sells 2 in-app purchases, starting at $799.00 per month and VoicePDF sells 2 in-app purchases, starting at $7.99 per 7 days. Whichever you choose, the download price is not the number that matters.

deepFormula ships an update every 2 months, VoicePDF every 2 days. The most recent releases landed on October 4, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | deepFormula | VoicePDF |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 2 days** |
| Size | 84 MB | 16 MB |
| Requires iOS | **15.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Jean Claude Zabaloff](https://appshunter.io/developer/1729237419) | [DANIEL CASTRILLO VEGA](https://appshunter.io/developer/6773472025) |

## What reviewers say

### deepFormula

[App page](https://appshunter.io/ios/app/deepformula/id6757321752)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| deepFormula | $799.00 | per month |
| deepFormula | Free | one-time |


### VoicePDF

[App page](https://appshunter.io/ios/app/voicepdf-scan-and-record/id6773472023)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Weekly | $7.99 | per 7 days |
| Premium Yearly | $44.99 | per year |


## Frequently asked questions

### Is deepFormula free?

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

### Is VoicePDF free?

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

### Do deepFormula or VoicePDF have ads?

Neither deepFormula nor VoicePDF shows ads.

### Which is updated more often, deepFormula or VoicePDF?

deepFormula ships an update every 2 months, and VoicePDF every 2 days. Most recently, deepFormula was updated on October 4, 2026 and VoicePDF on October 9, 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.*