Filter Calculator vs Nkalan
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Filter Calculator
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.
- 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
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Design RC, RL, and RLC filters (2nd–7th order) with Butterworth & Chebyshev alignments, passive crossovers, RLC band-pass/reject, and Twin-T notch—enter specs to instantly get component values and quick Bode insights in a clean, offline-friendly, dark-mode UI for lab, classroom, and audio/embedded work. What you can design: -RC & RL filters: low-pass / high-pass, 2nd–7th order -RLC filters: band-pass & band-reject (notch) -Butterworth: maximally flat magnitude -Chebyshev: ripple-tuned sharpness -Twin-T notch: precise mains or tone suppression -Passive crossovers: 2-way/3-way starter calculations Built for engineers, hobbyist and students, it turns specs into trustworthy parts fast—so you can prototype smarter, learn by tweaking, and move from idea to BOM with confidence.
Nkalan
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Nkalan est une application éducative hors ligne conçue pour favoriser l’apprentissage des enfants, même dans les zones où l’accès à Internet est limité ou inexistant. Elle propose un environnement interactif et ludique permettant aux élèves de renforcer leurs compétences en lecture, écriture, mathématiques et culture générale. Grâce à son design intuitif et à son contenu adapté au contexte local, Nkalan vise à rendre l’éducation plus accessible, équitable et engageante pour tous les enfants, tout en soutenant les enseignants et les parents dans le suivi des progrès d’apprentissage.
Screenshots
Verdict
The clearest difference is in-app purchases: Nkalan at none against Filter Calculator's 1. Nkalan also leads on ads (none vs shown) and update cadence (monthly vs every 5 months). On price and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Filter Calculator sells 1 one-off in-app purchase. Nkalan asks for nothing beyond the download.
Filter Calculator ships an update every 5 months, Nkalan monthly. The most recent releases landed on November 6, 2026 and October 25, 2026 respectively.
| Parameter | Filter Calculator | Nkalan |
|---|---|---|
| Price | Free | Free |
| Positive reviews | 50.0% of reviews | — |
| Update frequency | Every 5 months | Monthly — better |
| Ads | Yes | No — better |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.0 | 12.0 — better |
| Further details — not scored | ||
| Size | 53 MB | 60 MB |
| Age rating | 4+ | 4+ |
| Developer | Anas Abubakar | RobotsMali |
In-app purchases
Filter Calculator
- Upgrade to Pro$4.99
Nkalan
No in-app purchases
Questions
Is Filter Calculator free?
Is Nkalan free?
Do Filter Calculator or Nkalan have ads?
Which is updated more often, Filter Calculator or Nkalan?
Other comparisons
