Comparison

DigiKey vs TOPSIM

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

Head to head
About

DigiKey

Access a vast inventory of electronic components on the go. Find, order, and track parts with features like visual search, barcode scanning, and offline datasheet access. Registered users get enhanced order management and shipping notifications.

Highlights
  • Visual Search for parts by photo
  • Browse and filter product inventory
  • View detailed product specs, datasheets, photos, and videos
  • Real-time pricing and stock availability
  • Barcode scanner for quick part finding
  • Create shopping carts and place orders
  • Offline datasheet viewing
  • Electronic industry calculators
Features
Read full description

The Digi-Key app gives you instant access to one of the world’s largest inventories of in-stock electronic components. Find and order the parts and technologies you need for your design whether you’re at work, home, or on the go! Features: • Browse Digi-Key’s full product inventory or filter by product specifications • View detailed product specifications, datasheets, photos, and videos • See real-time pricing and stock availability • Use the barcode scanner to find parts quickly • Create lists of parts using multiple shopping carts, then place your order(s) • Use your recent history to resume searches or return to product pages • Access electronic industry calculators such as resistor color code, pressure, battery life, ohms, and more • Save datasheets on your device with the ability to view offline Do you have a My Digi-Key account? • As a registered user, you’ll benefit from additional features: • NEW! Shipping notification and tracking • View your profile, order status, and order history • Create packing lists to validate your shipment • Save your favorite products • Manage your saved addresses Please tell us about your experience! Rate our app, use the Contact Us feature, or reach us at mobile@digikey.com.

About

TOPSIM

This app provides seamless global data connectivity for travelers and connected devices. It offers instant data upon arrival in new countries without roaming charges and flexible, no-contract plans for home use. Manage multiple devices and connections from a single dashboard across over 190 countries.

Highlights
  • Instant global data activation
  • No roaming charges
  • Flexible no-contract plans
  • Connect any device (IoT, MiFi)
  • Real-time data monitoring
  • 24/7 human support
Features
Read full description

Connectivity should be effortless. TOPSIM makes it that way — for your phone, and for everything else you need online. For travelers and everyday data Land in a new country and you’re connected before you reach baggage claim. No roaming charges, no airport kiosks, no swapping tiny plastic cards. Just instant data the moment you arrive. And when you’re home, TOPSIM is the no-contract plan that doesn’t play games. No lock-in. No surprise overages. No bill that creeps up every quarter. Pay for what you need, change it anytime, cancel whenever. For your connected devices Trackers, routers, cameras, sensors, MiFi hotspots — if it needs a signal, TOPSIM keeps it online. Deploy one device or a thousand, manage every connection from a single dashboard, and keep them all running across 190+ countries. One account. One source of truth. Global coverage. Everything you need, in one app: • Activate an eSIM in minutes — scan, tap, done. 190+ countries. • Connect any device — phones, IoT, MiFi, and more, all in one place. • Watch data in real time — every line, every device, always clear. • Top up instantly — add data the second you need it, anywhere. • Switch plans on your terms — travel, home, or fleet. You decide. • Reach real support, 24/7 — actual humans, any time zone. Whether you’re boarding a flight, cutting ties with an overpriced carrier, or keeping a fleet of devices online across continents, TOPSIM connects it all — on your terms. Download TOPSIM. Connect everything, anywhere.

Screenshots

DigiKey3 screens
TOPSIM4 screens

Verdict

The call

The clearest difference is rating: DigiKey at 4.7 against TOPSIM's 3.0. DigiKey also leads on ratings volume (3.5K vs 2). TOPSIM's advantage is ads (none vs shown) and monetization model (free vs free with in-app purchases). On price, update cadence, 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.

ReceptionRating · Positive reviews · Number of ratings

DigiKey holds the better App Store score, 4.7 against 3.0. That said, the two scores are not equally well evidenced: DigiKey has 3.5K ratings behind it against 2, so its average is the more settled of the two.

UpkeepUpdate frequency

DigiKey ships an update every 2 months, TOPSIM monthly. The most recent releases landed on November 6, 2026 and November 4, 2026 respectively.

Scorecard4 real differences · 6 level
DigiKey versus TOPSIM: the parameters behind the verdict, then further details
ParameterDigiKeyTOPSIM
PriceFreeFree
Rating4.7 (3.5K ratings) — better3.0 (2 ratings)
Positive reviews50.9% of reviews—
Number of ratings3.5K — better2
Update frequencyEvery 2 monthsMonthly — better
AdsYesNo — better
In-app purchasesNoNo
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS14.7 — better15.0
Further details — not scored
Size32 MB94 MB
Age rating4+4+
DeveloperDigi-Key Corporation颂文 莫

Customer experience

DigiKey

All ratings3,450 ratings
Positive92.9%
Neutral3.3%
Negative3.8%
Written reviews159 reviews
Positive50.9%
Neutral13.2%
Negative35.8%

TOPSIM

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

Bugs and requests

DigiKey

Reported bugs

4 issues
  • Frequent crashes and app freezes
  • Inconsistent login and account behavior
  • Checkout process errors and failures
  • Unreliable search and filtering

Requested features

4 requests
  • Add BOM management tools
  • Improve sorting and filtering options
  • Integrate with more payment methods
  • Enhance order tracking and history

TOPSIM

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

DigiKey

No in-app purchases

None

TOPSIM

No in-app purchases

Questions

Is DigiKey free?
DigiKey is free to download, with no in-app purchases.
Is TOPSIM free?
TOPSIM is free to download, with no in-app purchases.
Which has better reviews, DigiKey or TOPSIM?
DigiKey is rated higher. DigiKey averages 4.7 out of 5 from 3.5K ratings, while TOPSIM averages 3.0 from 2 ratings.
Do DigiKey or TOPSIM have ads?
DigiKey shows ads; TOPSIM does not.
Which is updated more often, DigiKey or TOPSIM?
DigiKey ships an update every 2 months, and TOPSIM monthly. Most recently, DigiKey was updated on November 6, 2026 and TOPSIM on November 4, 2026.

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