# SF Dictionary vs AI Mock Interview

The clearest difference is in-app purchases: SF Dictionary at none against AI Mock Interview's 2. AI Mock Interview's advantage is ads (none vs shown). On price, update cadence, device support and iOS requirement there is nothing between them.

Both are free to download. AI Mock Interview sells 2 in-app purchases, starting at $3.99 per 7 days. SF Dictionary asks for nothing beyond the download.

Both ship on a similar rhythm, roughly monthly. The most recent releases landed on November 5, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | SF Dictionary | AI Mock Interview |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Monthly | Monthly |
| Size | 34 MB | 1 MB |
| Requires iOS | **17.0** | 18.6 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [KineticBit Inc.](https://appshunter.io/developer/1886255149) | [Lean Orbit LLC](https://appshunter.io/developer/1742356045) |

## What reviewers say

### SF Dictionary

[App page](https://appshunter.io/ios/app/sf-dictionary-cert-exam-prep/id6760790517)

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

**In-app purchases:** none


### AI Mock Interview

[App page](https://appshunter.io/ios/app/ai-mock-interview-prepline/id6773124282)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| PrepLine Weekly | $3.99 | per 7 days |
| PrepLine Annual | $29.99 | per year |


## Frequently asked questions

### Is SF Dictionary free?

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

### Is AI Mock Interview free?

AI Mock Interview is free to download, with in-app purchases available.

### Do SF Dictionary or AI Mock Interview have ads?

SF Dictionary shows ads; AI Mock Interview does not.

### Which is updated more often, SF Dictionary or AI Mock Interview?

SF Dictionary ships an update monthly, and AI Mock Interview monthly. Most recently, SF Dictionary was updated on November 5, 2026 and AI Mock Interview 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.*