Comparison

Voltie vs Letter Explainer

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

Head to head
About

Voltie

Features
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The Voltie app is the control centre for your Voltie EV charger, at home, in a residential building or at work. Start, stop and schedule charging from anywhere, follow your consumption and make the most of your solar panels, all in one simple interface. Voltie chargers are developed and manufactured in Hungary and use the European Type 2 connector. SMART CHARGING β€’ Remote control: start or stop charging from your phone, at home or on the road. β€’ Charging modes: automatic start when you plug in, scheduled, energy-based (kWh) and time-based charging, plus a battery-friendly mode. β€’ Notifications: get notified about plug-in, scheduled starts and charger errors. SOLAR AND GRID β€’ Solar charging: in Green mode you charge purely from your solar surplus; in Eco mode the grid tops up the rest. (Requires an external energy meter; Green mode is available in single-charger systems.) β€’ Grid Control: a feature unique on the market. Even at high grid voltage your solar inverter keeps running, so your daily production isn't lost. β€’ Dynamic load management: the charger only uses the capacity your home or building has free, phase by phase, so it never overloads the main fuse. (Requires an external energy meter.) FOR BUILDINGS AND BUSINESSES β€’ Power sharing: any number of Voltie chargers share one supply, and power sharing keeps working on the local network even without internet. β€’ RFID and user management: start charging with an RFID card or key fob, invite users and assign roles. β€’ Prepaid RFID: give guests or staff kWh or time quotas that renew daily, weekly or monthly. STATISTICS β€’ Track charged energy, time, distance, COβ‚‚ savings and cost by day, week, month and year. β€’ Receive your data in Excel by email. OPEN AND UP TO DATE β€’ Open system: OCPP 1.6J, HTTP API and Modbus, with smart-home integrations including Home Assistant, Amazon Alexa and Google Home. β€’ Regular over-the-air updates bring new features, so your charger stays current for years. β€’ The app is available in 23 languages. Questions or need help? Email us at help@voltie.eu Voltie and voltie.eu are independent of VoltiE in the US, and the app is not compatible with JuiceBox chargers.

About

Letter Explainer

Features
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Got an official letter and only understand half of it? Postklar explains it in plain words - in your language. HOW IT WORKS β€’ Take a photo of the letter or open a PDF β€’ Postklar reads it and explains it in 2-3 simple sentences β€’ You see right away what to do, by when, and how much WHAT POSTKLAR DOES β€’ Finds deadlines - even in the legal notice - and adds them to your calendar β€’ Copy amounts, IBANs and reference numbers with one tap β€’ Every number is checked against the letter; anything uncertain is flagged β€’ Ask questions about the letter: β€œWhat happens if I don’t pay?” β€’ Draft a reply: objection, payment plan, extension β€’ Tells you when to get professional help - with links to free advice services YOUR DIGITAL FILING CABINET Every letter is filed automatically by sender: tax office, job centre, health insurer, landlord… Searchable, exportable as PDF and synced across your devices with iCloud. IN YOUR LANGUAGE Explanations in English, German, Russian, Ukrainian, Arabic, Turkish, Polish and Spanish. PRIVACY β€’ Your letters are never stored on our servers and never used for AI training β€’ Private mode: analysis only on your iPhone β€’ No account, no email needed PRICING 3 letters free. Then Postklar Pro (monthly or yearly, up to 6 family members) or a pack of 5 letters. Postklar explains letters; it is not legal advice. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Voltie4 screens
Letter Explainer4 screens

Verdict

The call

The clearest difference is in-app purchases: Voltie at none against Letter Explainer's 3. Voltie also leads on device support (3 vs 1). Letter Explainer's advantage is update cadence (every 4 days vs every 3 weeks). On price, ads and iOS requirement there is nothing between them.

Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS

CostPrice Β· In-app purchases Β· Ads Β· Monetization

Both are free to download. Letter Explainer sells 3 in-app purchases, starting at $3.99 per month. Voltie asks for nothing beyond the download.

UpkeepUpdate frequency

Voltie ships an update every 3 weeks, Letter Explainer every 4 days. The most recent releases landed on October 16, 2026 and October 19, 2026 respectively.

Scorecard3 real differences Β· 3 level
Voltie versus Letter Explainer: the parameters behind the verdict, then further details
ParameterVoltieLetter Explainer
PriceFreeFree
Update frequencyEvery 3 weeksEvery 4 days β€” better
AdsNoNo
In-app purchasesNo β€” betterYes
DevicesiPhone, iPad, Apple Watch β€” betteriPhone
Requires iOS17.017.0
Further details β€” not scored
Size48 MB21 MB
Age rating4+4+
DeveloperVoltie Kft.Armen Ter-Oganezov

In-app purchases

None

Voltie

No in-app purchases

3 purchases

Letter Explainer

Subscriptions2
  • Postklar Pro Monthly$3.991 Month
  • Postklar Pro Yearly$24.991 Year
One-time1
  • 5 Scans$2.99

Questions

Is Voltie free?
Voltie is free to download, with no in-app purchases.
Is Letter Explainer free?
Letter Explainer is free to download, with in-app purchases available.
Do Voltie or Letter Explainer have ads?
Neither Voltie nor Letter Explainer shows ads.
Which is updated more often, Voltie or Letter Explainer?
Voltie ships an update every 3 weeks, and Letter Explainer every 4 days. Most recently, Voltie was updated on October 16, 2026 and Letter Explainer on October 19, 2026.

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