# Centro Lerner vs SDF

Centro Lerner and SDF are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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

Centro Lerner ships an update every 3 months, SDF every 4 months. The most recent releases landed on August 4, 2026 and August 20, 2026 respectively.

## The numbers

| Metric | Centro Lerner | SDF |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/centro-lerner/id6443810624/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 4 months |
| Monetization | Free | — |
| Size | 38 MB | 42 MB |
| Requires iOS | 15.6 | **15.1** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Jose Soto](https://appshunter.io/developer/895622809) | [Colegio de Escribanos de la Ciudad de Buenos Aires](https://appshunter.io/developer/1185879051) |

## What reviewers say

### Centro Lerner

[App page](https://appshunter.io/ios/app/centro-lerner/id6443810624)

Manage your appointments, doctors, and medical exams conveniently from your mobile device. Streamline your healthcare organization with this intuitive tool.

**Highlights:** Manage appointments, Track doctors, Organize medical studies, Directly from your phone, Streamline healthcare

**Features:** Vision Pro support

**In-app purchases:** none


### SDF

[App page](https://appshunter.io/ios/app/sdf/id6747388469)

**In-app purchases:** none


## Frequently asked questions

### Is Centro Lerner free?

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

### Is SDF free?

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

### Do Centro Lerner or SDF have ads?

Neither Centro Lerner nor SDF shows ads.

### Which is updated more often, Centro Lerner or SDF?

Centro Lerner ships an update every 3 months, and SDF every 4 months. Most recently, Centro Lerner was updated on August 4, 2026 and SDF on August 20, 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.*