# Multi Stage Pacer Test vs 3E Smartphone Substudy

The clearest difference is update cadence: 3E Smartphone Substudy at every 3 weeks against Multi Stage Pacer Test's every 5 months. Multi Stage Pacer Test's advantage is iOS requirement (10.0 vs 16.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Multi Stage Pacer Test ships an update every 5 months, 3E Smartphone Substudy every 3 weeks. The most recent releases landed on August 23, 2026 and September 18, 2026 respectively.

## The numbers

| Metric | Multi Stage Pacer Test | 3E Smartphone Substudy |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.9 (7 ratings)](https://appshunter.io/ios/app/multi-stage-pacer-test/id1046218229/reviews)** | — |
| Number of ratings | **7** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 3 weeks** |
| Monetization | Free | — |
| Size | 16 MB | 50 MB |
| Requires iOS | **10.0** | 16.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 12+ | 4+ |
| Developer | [Digital Vanilla](https://appshunter.io/developer/297675647) | [Avicenna Research Inc.](https://appshunter.io/developer/1137173051) |

## What reviewers say

### Multi Stage Pacer Test

[App page](https://appshunter.io/ios/app/multi-stage-pacer-test/id1046218229)

This app guides you through a progressive aerobic cardiovascular endurance test to estimate your VO2 max. It features a virtual coach, heart monitor support, and tracks your progress over multiple stages.

**Highlights:** Beep test for aerobic endurance, VO2 max estimation, Bluetooth LE heart monitor support, Virtual coach with speech synthesis, Progress tracking and performance review

**In-app purchases:** none


### 3E Smartphone Substudy

[App page](https://appshunter.io/ios/app/3e-smartphone-substudy/id6465963006)

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

**In-app purchases:** none


## Frequently asked questions

### Is Multi Stage Pacer Test free?

Multi Stage Pacer Test is free to download, with no in-app purchases.

### Is 3E Smartphone Substudy free?

3E Smartphone Substudy is free to download, with no in-app purchases.

### Do Multi Stage Pacer Test or 3E Smartphone Substudy have ads?

Neither Multi Stage Pacer Test nor 3E Smartphone Substudy shows ads.

### Which is updated more often, Multi Stage Pacer Test or 3E Smartphone Substudy?

Multi Stage Pacer Test ships an update every 5 months, and 3E Smartphone Substudy every 3 weeks. Most recently, Multi Stage Pacer Test was updated on August 23, 2026 and 3E Smartphone Substudy on September 18, 2026.

---

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