# Filter Calculator vs 모두의지도사

The clearest difference is update cadence: 모두의지도사 at every 6 days against Filter Calculator's every 5 months. 모두의지도사 also leads on review sentiment (73% vs 50%). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Filter Calculator sells 1 one-off in-app purchase and 모두의지도사 sells 7 in-app purchases, starting at $3.99 per month. Whichever you choose, the download price is not the number that matters.

Filter Calculator ships an update every 5 months, 모두의지도사 every 6 days. The most recent releases landed on October 22, 2026 and October 19, 2026 respectively.

## The numbers

| Metric | Filter Calculator | 모두의지도사 |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 50.0% of reviews | **72.7% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 5 months | **Every 6 days** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 53 MB | 34 MB |
| Requires iOS | **15.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Anas Abubakar](https://appshunter.io/developer/1581534101) | [LogicTree LLC (KR)](https://appshunter.io/developer/1763245435) |

## What reviewers say

### Filter Calculator

[App page](https://appshunter.io/ios/app/filter-calculator-electronics/id6754560517)

Design various types of electronic filters, including RC, RL, RLC, and passive crossovers, with customizable orders and alignments. Instantly obtain component values and Bode insights for lab, classroom, or audio projects. Ideal for engineers, hobbyists, and students.

**Highlights:** Design RC, RL, and RLC filters (2nd-7th order), Butterworth & Chebyshev alignments, Passive crossover calculations, Twin-T notch filter design, Instant component values, Bode insights, Offline-friendly dark mode UI

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Upgrade to Pro | $2.99 | one-time |


### 모두의지도사

[App page](https://appshunter.io/ios/app/id6754577781)

Prepare for sports instructor and health exercise manager certification exams with practice tests, diagnostic assessments, and detailed study analysis. Master subjects like sports psychology, exercise physiology, and more with structured learning tools. Achieve your certification goals efficiently.

**Highlights:** Practice past exam questions by subject and year, Diagnostic tests for personalized learning, Mock exams in a realistic testing environment, Error notes for focused review (Pro), Study analysis of accuracy and weak areas, Save favorite questions for repetition (Pro), Daily learning goals for consistent study habits

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

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 모두의지도사 Pro Monthly | $3.99 | per month |
| 2급+ 시험 1년 이용권 (재구매) | $2.99 | one-time |
| 1급 시험 1년 이용권 (재구매) | $4.99 | one-time |
| 2급+ 시험 1년 이용권 | $5.99 | one-time |
| 건강운동관리사 1년 이용권 (재구매) | $5.99 | one-time |
| 1급 시험 1년 이용권 | $9.99 | one-time |
| 건강운동관리사 1년 이용권 | $11.99 | one-time |


## Frequently asked questions

### Is Filter Calculator free?

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

### Is 모두의지도사 free?

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

### Do Filter Calculator or 모두의지도사 have ads?

Both Filter Calculator and 모두의지도사 show ads.

### Which is updated more often, Filter Calculator or 모두의지도사?

Filter Calculator ships an update every 5 months, and 모두의지도사 every 6 days. Most recently, Filter Calculator was updated on October 22, 2026 and 모두의지도사 on October 19, 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.*