# DoorLink vs Calc

The clearest difference is update cadence: Calc at fortnightly against DoorLink's every 2 months. DoorLink's advantage is iOS requirement (12.0 vs 18.0). On price, ads, in-app purchases and device support there is nothing between them.

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

DoorLink ships an update every 2 months, Calc fortnightly. The most recent releases landed on October 25, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | DoorLink | Calc |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/calc-u-59/id6761413142/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Fortnightly** |
| Monetization | — | Free |
| Size | 58 MB | 9 MB |
| Requires iOS | **12.0** | 18.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [VAT Electronic s.r.o.](https://appshunter.io/developer/1769363422) | [Martin Erzberger](https://appshunter.io/developer/1889469770) |

## What reviewers say

### DoorLink

[App page](https://appshunter.io/ios/app/doorlink/id6698872456)

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

**In-app purchases:** none


### Calc

[App page](https://appshunter.io/ios/app/calc-u-59/id6761413142)

Explore the inner workings of classic TI-59, TI-58, and TI-58C calculators. This tool offers cycle-accurate emulation, a debugger to inspect code and registers, and a functional paper tape printer recreation. Load and save programs using magnetic card emulation and state files.

**Highlights:** Cycle-accurate TMC0501 processor emulation, Integrated debugger for program and register inspection, Functional PC-100C paper tape printer recreation, Magnetic card reader for loading/saving programs, State file loading for instant machine configuration, Solid State Module support

**In-app purchases:** none


## Frequently asked questions

### Is DoorLink free?

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

### Is Calc free?

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

### Do DoorLink or Calc have ads?

Neither DoorLink nor Calc shows ads.

### Which is updated more often, DoorLink or Calc?

DoorLink ships an update every 2 months, and Calc fortnightly. Most recently, DoorLink was updated on October 25, 2026 and Calc on October 28, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*