Comparison

TLS Inspector vs Techniker Toolbox

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

Head to head
About

TLS Inspector

Inspect TLS certificates for any domain or IP address to understand trust and safety. Detect man-in-the-middle attacks by highlighting invalid certificates. Access detailed certificate properties and integrate with your browser.

Highlights
  • Input domain or IP for inspection
  • Inspect websites via browser extension
  • View entire issue chain and trust status
  • Detailed TLS certificate properties
  • Detect man-in-the-middle attacks
  • Share sheet integration with Safari
Features
Read full description

Trust & Safety in the palm of your hand. • Input & Inspect. It's really that simple. Input a domain or IP address using the TLS Inspector app, or inspect any website from within your favourite browser using our Inspect Website extension. • No Nonsense Results. "At a glance" has never been easier. TLS Inspector will show you the entire issue chain for any website, and whether or not your device trusts that chain. • Dive Deep. Details for days. View important properties of any TLS certificate including fingerprints, dates, algorithms, and more. • Stay Safe Online. No training required. TLS Inspector makes it easy to detect and avoid man-in-the-middle attacks on unsafe networks by highlighting invalid and untrustworthy certificates. • Right Place, Right Time. Inspect nearly anything from anywhere. Easily access TLS Inspector from other apps, such as Safari, with the Show Certificates share sheet action. TLS Inspector is free & libre open source software (FLOSS) with source code available on GitHub. TLS Inspector is made entirely without the use of Artificial Intelligence (AI) or Large Language Models (LLMs).

About

Techniker Toolbox

This app provides essential technical calculators and a compact lexicon for maintenance, service, and technical education. It covers electrical engineering, mechanics, IT, pneumatics, and hydraulics, with basic functions available for free and premium features via a one-time purchase.

Highlights
  • Electrical engineering calculations
  • Mechanics and drive calculations
  • IT and OT subnetting
  • Pneumatics and hydraulics
  • Technical lexicon and guides
  • Unit and dB converters
  • Favorites and history
Features
Read full description

Techniker Toolbox is your practical companion for maintenance, field service, workshop tasks and technical training. Technical calculators, a compact reference and clear help texts support your work on site. ELECTRICAL ENGINEERING Ohm’s law, three-phase power, voltage drop, motor current, circuit protection, and power supply and UPS sizing. MECHANICS Torque and power, conveyor belt speed, bearing life, gear ratios, motor and drive sizing, and thermal expansion. IT AND OT Subnets and CIDR, data rates and transfer times, storage requirements, video storage, PoE power budgets and UPS runtime. PNEUMATICS AND HYDRAULICS Cylinder force, pneumatic sizing, hydraulic power and compressed air consumption. REFERENCE AND EVERYDAY TASKS A technical reference with explanations, checks and diagrams for RJ45 T568A/B and fiber color sequences. A unit converter, dB calculator, favorites and recently used tools help you find answers quickly. Basic features are free. An optional one-time Premium purchase permanently unlocks additional features, including advanced calculators and iCloud synchronization. The app supports German, English, Spanish, French, Italian, Portuguese, Dutch, Polish, Japanese, Simplified Chinese and Korean. Number formatting and inputs follow your region. Results are for guidance only and do not replace professional design or inspection. Follow local regulations, manufacturer specifications and safety requirements. Work on electrical installations must be carried out by appropriately qualified personnel.

Screenshots

TLS Inspector4 screens
Techniker Toolbox4 screens

Verdict

The call

The clearest difference is in-app purchases: TLS Inspector at none against Techniker Toolbox's 1. TLS Inspector also leads on device support (3 vs 1) and iOS requirement (15.0 vs 17.0). Techniker Toolbox's advantage is review sentiment (100% vs 84%). On price, update cadence and ads 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. Techniker Toolbox sells 1 one-off in-app purchase. TLS Inspector asks for nothing beyond the download.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 6 weeks. The most recent releases landed on November 2, 2026 and October 30, 2026 respectively.

Scorecard5 real differences · 5 level
TLS Inspector versus Techniker Toolbox: the parameters behind the verdict, then further details
ParameterTLS InspectorTechniker Toolbox
PriceFreeFree
Rating4.8 (256 ratings) — better—
Positive reviews83.7% of reviews100.0% of reviews — better
Number of ratings256 — better—
Update frequencyEvery 6 weeksEvery 6 weeks
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFreemium
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS15.0 — better17.0
Further details — not scored
Size19 MB4 MB
Age rating4+4+
DeveloperIan SpenceDominik Gausmann

Customer experience

TLS Inspector

All ratings256 ratings
Positive95.3%
Neutral0.8%
Negative3.9%
Written reviews49 reviews
Positive83.7%
Neutral6.1%
Negative10.2%

Techniker Toolbox

Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Bugs and requests

TLS Inspector

Reported bugs

5 issues
  • App crash issue fixed
  • Share extension 'inspect website' never works
  • Error checking for TLS bundle updates
  • App freezes
  • App locks up, non functional

Requested features

3 requests
  • Continue making app great and helpful
  • Add dark mode option
  • More advanced features

Techniker Toolbox

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

TLS Inspector

No in-app purchases

1 purchases

Techniker Toolbox

One-time1
  • Techniker Toolbox Premium$1.99

Questions

Is TLS Inspector free?
TLS Inspector is free to download, with no in-app purchases.
Is Techniker Toolbox free?
Techniker Toolbox is free to download, with in-app purchases available.
Do TLS Inspector or Techniker Toolbox have ads?
Neither TLS Inspector nor Techniker Toolbox shows ads.
Which is updated more often, TLS Inspector or Techniker Toolbox?
TLS Inspector ships an update every 6 weeks, and Techniker Toolbox every 6 weeks. Most recently, TLS Inspector was updated on November 2, 2026 and Techniker Toolbox on October 30, 2026.

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