Comparison

Paestum & Velia vs DB Component Decoder

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Paestum & Velia

Explore ancient cities through geolocalized stories, sounds, and smells. This app offers a customizable historical journey, allowing you to experience different eras of daily life. Available in multiple languages, it aims to connect past and present.

Highlights
  • Geolocalized narration
  • Historical stories, sounds, and smells
  • Customizable routes
  • Multi-language support
  • Explore daily life in ancient cities
Features
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This application allows you to discover aspects of the Paestum and Velia's daily life through a geolocalized narration made by stories, sounds and smells that allow to live different historical moments in which the city has been a protagonist. A journey into the past to understand our present. The application is free to download, it allows to customise the route (by duration and theme) and is available in 6 languages (Italian, English, French, German, Spanish, Russian and Chinese).

About

DB Component Decoder

Features
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Lo strumento completo per studenti e appassionati di elettronica. Decoder componenti, progettazione alimentatori, database semiconduttori e quiz interattivi — tutto offline, tutto gratis, zero pubblicità. DECODER COMPONENTI Resistori: decodifica bande colore 3, 4, 5 e 6 bande. Inserisci i colori e ottieni il valore, oppure inserisci il valore e scopri i colori. Suggerimento serie E12, E24, E96. Condensatori: codici ceramici (104, 472…), tantalio ed elettrolitici. Tabella rapida dei codici più comuni. Induttori: bande colore e codici SMD (100, 4R7…). LED: calcola il resistore di caduta per qualsiasi LED. Supporta LED in serie e stringhe in parallelo, con preset per i colori più comuni. CALCOLO CIRCUITI Serie e parallelo per R, C e L, fino a 6 componenti. Costante di tempo RC e RL, frequenza di taglio, energia e potenza. Filtri RC, RL e RLC con diagramma di Bode interattivo. ALIMENTAZIONE Progettazione alimentatore AC/DC: scegli la topologia (mezza onda, ponte, presa centrale), calcola tensione DC, ripple e condensatore bulk. Verifica dropout del regolatore. Fusibili trasformatore: dimensionamento primario e secondario con margine per corrente di inrush. Scelta tra fusibile rapido, medio e lento. DATABASE SEMICONDUTTORI Decoder codici SMD per resistori, condensatori, transistor e diodi. Transistor: NPN, PNP, N-MOSFET, P-MOSFET, JFET, IGBT. Scheda completa con pinout, caratteristiche elettriche, equivalenti e sostituti. Diodi: signal, Schottky, rectifier, Zener, TVS e LED. Ogni componente con VF, VRRM, IF, package e note applicative. Regolatori: serie 78xx, 79xx, LM317, LM337 e equivalenti. Ponti raddrizzatori: database con modelli integrati e discreti. DIDATTICA Esercizi interattivi con punteggio e spiegazioni dettagliate. Cronologia degli ultimi 50 componenti analizzati. CARATTERISTICHE 100% offline — nessuna connessione richiesta. Dark mode automatica o manuale. Nessun tracciamento, nessuna pubblicità, nessun account. Progettata da un docente ITIS per studenti di Elettronica e Automazione.

Screenshots

Paestum & Velia4 screens
DB Component Decoder4 screens

Verdict

The call

The clearest difference is update cadence: DB Component Decoder at every 3 days against Paestum & Velia's every 3 weeks. Paestum & Velia's advantage is iOS requirement (13.0 vs 16.6). On price, ads, in-app purchases 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

CostPrice · In-app purchases · Ads · Monetization

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

UpkeepUpdate frequency

Paestum & Velia ships an update every 3 weeks, DB Component Decoder every 3 days. The most recent releases landed on October 1, 2026 and October 5, 2026 respectively.

Scorecard2 real differences · 8 level
Paestum & Velia versus DB Component Decoder: the parameters behind the verdict, then further details
ParameterPaestum & VeliaDB Component Decoder
PriceFreeFree
Rating3.3 (4 ratings) — better—
Positive reviews66.7% of reviews—
Number of ratings4 — better—
Update frequencyEvery 3 weeksEvery 3 days — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPod — betteriPhone
Requires iOS13.0 — better16.6
Further details — not scored
Size29 MB18 MB
Age rating4+4+
DeveloperVisivalabDavide Bertolino

In-app purchases

None

Paestum & Velia

No in-app purchases

None

DB Component Decoder

No in-app purchases

Questions

Is Paestum & Velia free?
Paestum & Velia is free to download, with no in-app purchases.
Is DB Component Decoder free?
DB Component Decoder is free to download, with no in-app purchases.
Do Paestum & Velia or DB Component Decoder have ads?
Neither Paestum & Velia nor DB Component Decoder shows ads.
Which is updated more often, Paestum & Velia or DB Component Decoder?
Paestum & Velia ships an update every 3 weeks, and DB Component Decoder every 3 days. Most recently, Paestum & Velia was updated on October 1, 2026 and DB Component Decoder on October 5, 2026.

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