# Contact Lenses vs DS trainer

The clearest difference is price: DS trainer at Free against Contact Lenses's $0.99. DS trainer also leads on in-app purchases (none vs 1) and ads (none vs shown). Contact Lenses's advantage is update cadence (every 11 months vs every 39 months). On device support there is nothing between them.

DS trainer is free to download; Contact Lenses costs $0.99 up front. Contact Lenses sells 1 one-off in-app purchase. DS trainer asks for nothing beyond the download.

Contact Lenses ships an update every 11 months, DS trainer every 39 months. The most recent releases landed on November 6, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | Contact Lenses | DS trainer |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | **[1.0 (1 ratings)](https://appshunter.io/ios/app/contact-lenses/id446322112/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 4.8% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 11 months** | Every 39 months |
| Monetization | Free with in-app purchases | — |
| Size | 6 MB | 12 MB |
| Requires iOS | 13.4 | **11.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [LionsApp di Nallbati Elton](https://appshunter.io/developer/432915499) | [Elpidio Di Santo](https://appshunter.io/developer/1538560186) |

## What reviewers say

### Contact Lenses

[App page](https://appshunter.io/ios/app/contact-lenses/id446322112)

This app helps you track the usage of your contact lenses to ensure you use them for the optimal duration. It prevents premature disposal and avoids complications from overused lenses, saving you money and protecting your eye health.

**Highlights:** Track weekly lens usage, Add various lens types via in-app purchase, Set daily usage notifications, View days left until expiration, Monitor number of times lenses have been used, Record lens start date

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Full Pack | $1.99 | one-time |


### DS trainer

[App page](https://appshunter.io/ios/app/ds-trainer/id1538560184)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Contact Lenses free?

Contact Lenses costs $0.99, and also offers in-app purchases.

### Is DS trainer free?

DS trainer is free to download, with no in-app purchases.

### Do Contact Lenses or DS trainer have ads?

Contact Lenses shows ads; DS trainer does not.

### Which is updated more often, Contact Lenses or DS trainer?

Contact Lenses ships an update every 11 months, and DS trainer every 39 months. Most recently, Contact Lenses was updated on November 6, 2026 and DS trainer on October 27, 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.*