# MPI Mobile App vs CalStack

The clearest difference is price: MPI Mobile App at Free against CalStack's $9.99. MPI Mobile App also leads on iOS requirement (11.0 vs 18.0). CalStack's advantage is update cadence (every 5 days vs every 2 months) and chart position (#190 vs unranked). On ads, in-app purchases and device support there is nothing between them.

MPI Mobile App is free to download; CalStack costs $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.

MPI Mobile App ships an update every 2 months, CalStack every 5 days. The most recent releases landed on September 18, 2026 and September 23, 2026 respectively.

## The numbers

| Metric | MPI Mobile App | CalStack |
| --- | --- | --- |
| Price | **Free** | $9.99 |
| Rating | **[2.4 (28 ratings)](https://appshunter.io/ios/app/mpi-mobile-app/id1256643558/reviews)** | — |
| Number of ratings | **28** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 5 days** |
| Monetization | Free | — |
| Best chart rank | — | **#190** |
| Size | 74 MB | 11 MB |
| Requires iOS | **11.0** | 18.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Age rating | 4+ | 4+ |
| Developer | [MOTION PICTURE INDUSTRY HEALTH PLAN](https://appshunter.io/developer/1256643557) | [Pick Two Productions Inc](https://appshunter.io/developer/1860419697) |

## What reviewers say

### MPI Mobile App

[App page](https://appshunter.io/ios/app/mpi-mobile-app/id1256643558)

This app offers a quick guide to benefits for participants of the Motion Picture Industry Pension & Health Plans. It provides essential information for members to understand their coverage and entitlements.

**Highlights:** Benefit guide access, Participant information, Health plan details, Pension plan details

**Features:** macOS Compatibility

**In-app purchases:** none


### CalStack

[App page](https://appshunter.io/ios/app/calstack/id6789672345)

**Currently charting:** #190 Top Paid · Productivity (US App Store)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is MPI Mobile App free?

MPI Mobile App is free to download, with no in-app purchases.

### Is CalStack free?

CalStack costs $9.99, with no in-app purchases.

### Do MPI Mobile App or CalStack have ads?

Neither MPI Mobile App nor CalStack shows ads.

### Which is updated more often, MPI Mobile App or CalStack?

MPI Mobile App ships an update every 2 months, and CalStack every 5 days. Most recently, MPI Mobile App was updated on September 18, 2026 and CalStack on September 23, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*