# InstaTrainMe Trainer vs ShellShock Trainer

The clearest difference is update cadence: ShellShock Trainer at every 4 days against InstaTrainMe Trainer's monthly. InstaTrainMe Trainer's advantage is iOS requirement (12.0 vs 15.0). On price, rating, review sentiment and ratings volume there is nothing between them.

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

On the App Store both sit at effectively the same score — 5.0 for InstaTrainMe Trainer against 5.0 for ShellShock Trainer. Both are backed by a comparable volume of ratings — 2 and 1 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

InstaTrainMe Trainer ships an update monthly, ShellShock Trainer every 4 days. The most recent releases landed on October 11, 2026 and October 26, 2026 respectively.

## The numbers

| Metric | InstaTrainMe Trainer | ShellShock Trainer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (2 ratings)](https://appshunter.io/ios/app/instatrainme-trainer/id6499338940/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/shellshock-trainer/id6807605710/reviews) |
| Number of ratings | **2** | 1 |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Monthly | **Every 4 days** |
| Monetization | Free | Free |
| Size | 251 MB | 8 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 12+ |
| Developer | [InstaTrainMe Technologies, INC.](https://appshunter.io/developer/1743191389) | [Atlas Nutricles LLC](https://appshunter.io/developer/6807605712) |

## What reviewers say

### InstaTrainMe Trainer

[App page](https://appshunter.io/ios/app/instatrainme-trainer/id6499338940)

Connect directly with clients seeking fitness expertise. Manage your schedule, attract new clients, and grow your business through a comprehensive marketplace platform. Facilitates secure bookings, payments, and communication.

**Highlights:** Client discovery marketplace, Instant and scheduled bookings, Client matching by skills and location, Business management dashboard, Secure payment processing, In-app client chat, Onsite GPS tracking

**Features:** macOS Compatibility, Apple Wallet

**In-app purchases:** none


### ShellShock Trainer

[App page](https://appshunter.io/ios/app/shellshock-trainer/id6807605710)

Log your gym sessions, track personal records, and visualize which muscles you've worked. Connect with a supportive community of lifters, share your progress, and discover new training routines.

**Highlights:** Log workouts and sessions, Track personal records (PRs), Visualize muscle engagement, Connect with a lifting community, Save training history, Follow other lifters

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

**In-app purchases:** none


## Frequently asked questions

### Is InstaTrainMe Trainer free?

InstaTrainMe Trainer is free to download, with no in-app purchases.

### Is ShellShock Trainer free?

ShellShock Trainer is free to download, with no in-app purchases.

### Which has better reviews, InstaTrainMe Trainer or ShellShock Trainer?

InstaTrainMe Trainer and ShellShock Trainer are both rated 5.0 out of 5 on the App Store, from 2 and 1 ratings respectively.

### Do InstaTrainMe Trainer or ShellShock Trainer have ads?

Neither InstaTrainMe Trainer nor ShellShock Trainer shows ads.

### Which is updated more often, InstaTrainMe Trainer or ShellShock Trainer?

InstaTrainMe Trainer ships an update monthly, and ShellShock Trainer every 4 days. Most recently, InstaTrainMe Trainer was updated on October 11, 2026 and ShellShock Trainer on October 26, 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.*