# ZEISS TEMPAR go vs Bionic Reader

The clearest difference is in-app purchases: ZEISS TEMPAR go at none against Bionic Reader's 2. ZEISS TEMPAR go also leads on ads (none vs shown) and iOS requirement (8.0 vs 15.0). On price, update cadence and device support there is nothing between them.

Both are free to download. Bionic Reader sells 2 in-app purchases, starting at $0.99 per month. ZEISS TEMPAR go asks for nothing beyond the download.

ZEISS TEMPAR go ships an update every 6 months, Bionic Reader every 3 months. The most recent releases landed on November 3, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | ZEISS TEMPAR go | Bionic Reader |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 6 months | **Every 3 months** |
| Size | 82 MB | 48 MB |
| Requires iOS | **8.0** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Carl Zeiss AG](https://appshunter.io/developer/488066215) | [Jonatan Ortega](https://appshunter.io/developer/6773707440) |

## What reviewers say

### ZEISS TEMPAR go

[App page](https://appshunter.io/ios/app/zeiss-tempar-go/id1548444273)

**In-app purchases:** none


### Bionic Reader

[App page](https://appshunter.io/ios/app/bionic-reader-speed-reading/id6781438747)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Bionic Reader Premium | $0.99 | per month |
| Bionic Reader — De por vida | $3.99 | one-time |


## Frequently asked questions

### Is ZEISS TEMPAR go free?

ZEISS TEMPAR go is free to download, with no in-app purchases.

### Is Bionic Reader free?

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

### Do ZEISS TEMPAR go or Bionic Reader have ads?

Bionic Reader shows ads; ZEISS TEMPAR go does not.

### Which is updated more often, ZEISS TEMPAR go or Bionic Reader?

ZEISS TEMPAR go ships an update every 6 months, and Bionic Reader every 3 months. Most recently, ZEISS TEMPAR go was updated on November 3, 2026 and Bionic Reader on October 31, 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.*