# BLine Mobile vs FormulaPad

The clearest difference is update cadence: BLine Mobile at every 3 weeks against FormulaPad's every 2 months. On price, review sentiment, ads and in-app purchases there is nothing between them.

Both are free to download. BLine Mobile sells 2 in-app purchases, starting at $0.99 per month and FormulaPad sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

BLine Mobile ships an update every 3 weeks, FormulaPad every 2 months. The most recent releases landed on November 6, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | BLine Mobile | FormulaPad |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (8 ratings)](https://appshunter.io/ios/app/bline-mobile/id1153367118/reviews)** | — |
| Number of ratings | **8** | — |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 2 months |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 4 MB | 3 MB |
| Requires iOS | **16.2** | 17.0 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Blue Sparrow Systems Limited](https://appshunter.io/developer/1153367117) | [小倩 徐](https://appshunter.io/developer/6771586178) |

## What reviewers say

### BLine Mobile

[App page](https://appshunter.io/ios/app/bline-mobile/id1153367118)

Easily create visual comparisons of text changes from your mobile device. This tool is ideal for reviewing documents, discussing edits, or sending feedback. It also offers an extension for blacklining directly from other applications.

**Highlights:** Create blacklines from electronic or paper text, Review documents and discuss changes, Send comments and feedback, Extension for blacklining from other apps, Mobile document comparison tool

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| BLine Monthly | $0.99 | per month |
| BLine Annual | $5.49 | per year |


### FormulaPad

[App page](https://appshunter.io/ios/app/formulapad/id6785820497)

A local-first math notebook calculator for iPhone. Type natural formulas, reuse variables, and save calculations as notes. Includes practical templates and unit conversions for everyday math needs.

**Highlights:** Natural formula input, Variable reuse, Calculation history, Math notes, Practical templates, Unit conversion, Function plotting

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| FormulaPad Pro | $0.99 | one-time |


## Frequently asked questions

### Is BLine Mobile free?

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

### Is FormulaPad free?

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

### Do BLine Mobile or FormulaPad have ads?

Neither BLine Mobile nor FormulaPad shows ads.

### Which is updated more often, BLine Mobile or FormulaPad?

BLine Mobile ships an update every 3 weeks, and FormulaPad every 2 months. Most recently, BLine Mobile was updated on November 6, 2026 and FormulaPad 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.*