# OptoFitting vs TIER

The clearest difference is in-app purchases: TIER at none against OptoFitting's 2. TIER also leads on ratings volume (9 vs 1) and iOS requirement (12.0 vs 15.6). On price, rating, review sentiment and update cadence there is nothing between them.

Both are free to download. OptoFitting sells 2 in-app purchases, starting at $19.99 per month. TIER asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for OptoFitting against 5.0 for TIER. That said, the two scores are not equally well evidenced: TIER has 9 ratings behind it against 1, so its average is the more settled of the two. Written reviews split almost evenly too, at 100% and 100% positive.

OptoFitting ships an update monthly, TIER every 6 weeks. The most recent releases landed on October 23, 2026 and October 17, 2026 respectively.

## The numbers

| Metric | OptoFitting | TIER |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/optofitting/id1576655068/reviews) | [5.0 (9 ratings)](https://appshunter.io/ios/app/tier-simplify-english/id6470771969/reviews) |
| Number of ratings | 1 | **9** |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Monthly** | Every 6 weeks |
| Monetization | Free with in-app purchases | **Free** |
| Size | 16 MB | 62 MB |
| Requires iOS | 15.6 | **12.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 12+ | 4+ |
| Developer | [Alireza Nazer](https://appshunter.io/developer/1576655070) | [ForwardNLP, Inc.](https://appshunter.io/developer/1714201575) |

## What reviewers say

### OptoFitting

[App page](https://appshunter.io/ios/app/optofitting/id1576655068)

Streamline progressive and single-vision lens fitting with precise, repeatable measurements. This app guides you through capturing key fitting parameters using a 3D printed jig and your device, reducing errors and speeding up the process for eyewear professionals.

**Highlights:** Precise fitting measurements, Step-by-step workflow, 3D printable jig included, Tutorial videos and FAQs, Reduces fitting errors, Fast workflow for professionals

**Features:** Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium 1 Month(+3 Month free) | $19.99 | per month |
| Premium 6 Month(+3 Month free) | $106.99 | per 6 months |


### TIER

[App page](https://appshunter.io/ios/app/tier-simplify-english/id6470771969)

This app uses AI to simplify English text from photos. Select your desired simplification level and get easy-to-understand definitions for words.

**Highlights:** Photo to text conversion, AI-powered simplification, Adjustable simplification tiers, Word definitions, Camera input

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is OptoFitting free?

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

### Is TIER free?

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

### Which has better reviews, OptoFitting or TIER?

OptoFitting and TIER are both rated 5.0 out of 5 on the App Store, from 1 and 9 ratings respectively.

### Do OptoFitting or TIER have ads?

Neither OptoFitting nor TIER shows ads.

### Which is updated more often, OptoFitting or TIER?

OptoFitting ships an update monthly, and TIER every 6 weeks. Most recently, OptoFitting was updated on October 23, 2026 and TIER on October 17, 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.*