# TrackBack Symptom Tracker vs Caliper

The clearest difference is in-app purchases: TrackBack Symptom Tracker at none against Caliper's 5. TrackBack Symptom Tracker also leads on device support (3 vs 1) and iOS requirement (15.1 vs 17.0). On price and ads there is nothing between them.

Both are free to download. Caliper sells 5 in-app purchases, starting at $12.99 per 7 days. TrackBack Symptom Tracker asks for nothing beyond the download.

## The numbers

| Metric | TrackBack Symptom Tracker | Caliper |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | — | Every 2 weeks |
| Size | 44 MB | 16 MB |
| Requires iOS | **15.1** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 17+ | 17+ |
| Developer | [Geoffrey Jensen](https://appshunter.io/developer/1877156841) | [OGUN KESKIN](https://appshunter.io/developer/1895590621) |

## What reviewers say

### TrackBack Symptom Tracker

[App page](https://appshunter.io/ios/app/trackback-symptom-tracker/id6759174933)

**Features:** macOS Compatibility

**In-app purchases:** none


### Caliper

[App page](https://appshunter.io/ios/app/caliper-face-scan-and-coach/id6779588686)

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

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Caliper Pro Weekly | $12.99 | per 7 days |
| Caliper Pro Yearly (Offer) | $44.99 | per year |
| Caliper Pro Yearly | $59.99 | per year |
| Single Report | $6.99 | one-time |
| Future Self Pack | $7.99 | one-time |


## Frequently asked questions

### Is TrackBack Symptom Tracker free?

TrackBack Symptom Tracker is free to download, with no in-app purchases.

### Is Caliper free?

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

### Do TrackBack Symptom Tracker or Caliper have ads?

Neither TrackBack Symptom Tracker nor Caliper shows ads.

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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.*