Comparison

Sight Keys vs Recallo

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

Head to head
About

Sight Keys

This app helps piano players improve their music reading skills through interactive exercises, structured lessons, and playable songs. It offers customizable practice sessions to build note recognition, rhythm, and fluency for steady daily improvement.

Highlights
  • Customizable practice sessions
  • Step-by-step lessons
  • Playable songs and exercises
  • Note recognition and rhythm training
  • Progress tracking
  • Chord and key signature practice
Features
Read full description

Learn to read piano music faster with interactive practice, step-by-step lessons, and playable songs in Sight Keys. Sight Keys helps you build real sight-reading skills instead of just memorizing notes. Train note recognition, rhythm, key signatures, chords, and reading fluency with focused exercises designed for steady daily improvement. What you can do in Sight Keys: - Create custom sight-reading practice sessions - Adjust clef, note range, key signature, time signature, note duration, and difficulty - Work through structured lessons that teach reading step by step - Play songs and reading exercises inside the app - Practice chords and key signatures - Track your progress and keep a daily goal - Enjoy a clean piano interface built for quick, repeatable practice Built for consistent progress: - Great for short daily sessions - Beginner-friendly, but flexible enough to grow with you - Supports treble clef, bass clef, and broader reading practice - Designed for focused drills and musical play Premium is a one-time purchase and unlocks: - All lessons - All songs - Advanced practice options - Microphone input for premium note detection - Ad-free experience - Future premium content updates With premium microphone input, Sight Keys can listen for the notes you play on a real piano and use them in practice. Audio is processed in real time on your device. Sight Keys is a great fit for: - Beginner piano students - Returning players rebuilding reading skills - Teachers looking for a simple practice companion - Anyone who wants to get faster and more confident at reading notes on the staff Why Sight Keys: - Simple, focused practice flow - Flexible training options - Lessons, songs, and drills in one app - One-time premium unlock, no subscription required Whether you are learning your first notes or sharpening your reading speed, Sight Keys gives you practical tools to make sight reading part of your daily piano routine. Download Sight Keys and start reading with confidence.

About

Recallo

Features
Read full description

Recallo is a vocabulary trainer for German and Spanish, on iPhone and iPad. Every day it quizzes you on the words that are due and teaches you new ones. TWO LANGUAGES, ONE APP Each language has its own learning path, its own dictionary and its own streak. Switch with the flag next to the logo. Your first course is free, more come with Premium. RECALL, NOT RECOGNITION You type the word yourself, as a translation or as the gap in an example sentence. What you actively recall stays with you far longer than what you merely recognize on a card. German nouns come with their article, and Recallo tells you when it's missing or an umlaut is off. START WHERE YOU ARE Tell Recallo roughly where you stand, from A1 to C1. It starts there and learns what you already know as you go. Words you know get skipped. REVIEWS AT THE RIGHT MOMENT How often a word comes back depends on you. Know it, and the next review moves further out. Get it wrong, and it comes back soon. You never drill lists you already know. GRAMMAR IN CONTEXT German verbs come up in the form the sentence needs, like gepasst instead of passen, and the tenses grow with your level: no past perfect while you're still at A1. In Spanish you drill every tense, with conjugation tables for nearly 5,000 verbs. LEARNING TIPS False friends like Handy and handy, bekommen and become, ser and estar: thousands of words come with a learning tip written for English speakers. It sits as a flashcard right next to the answer. A REAL DICTIONARY Over 70,000 entries for German and nearly 100,000 for Spanish, all with English meanings, example sentences, every form and audio. Plus over 5,000 Spanish idioms and 223 proverbs. AI TUTOR When do you say seit and when vor? Ask the AI tutor. It answers in English, with examples, and can turn the answer into a flashcard that joins your reviews. TURBO MODE Before a test or a trip, learn your own word lists as a pack, without breaks and separate from your daily plan. What sticks in Turbo counts for your learning plan too. YOUR OWN FLASHCARDS Rules, phrases, anything that isn't a single word: create your own question and answer cards. They follow the same review rhythm as your vocabulary. KEEP GOING A daily reminder, a streak for every day you reach your goal, and streak freezes that cover a missed day. FREE AND PREMIUM You can use Recallo for free and without ads: one language, the dictionary, pronunciation and daily reviews. Free limits the pace to 5 new words a day, conjugation to the present tense and the AI tutor to three questions a day. Premium lifts the limits: more languages, up to 100 new words a day, every tense, the AI tutor without a daily limit, more Turbo packs and streak freezes. Recallo Premium is available as a monthly or yearly subscription. Payment is charged to your Apple Account at confirmation of purchase. The subscription renews automatically unless you cancel it at least 24 hours before the end of the current period. You can manage and cancel it in your Apple Account settings. Terms of use (in German): https://recallo.de/agb Privacy policy (in German): https://recallo.de/datenschutz

Screenshots

Sight Keys4 screens
Recallo4 screens

Verdict

The call

Sight Keys and Recallo are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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. Sight Keys sells 1 one-off in-app purchase and Recallo sells 2 in-app purchases, starting at $6.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly weekly. Both last shipped on October 24, 2026.

ScorecardNo meaningful differences
Sight Keys versus Recallo: the parameters behind the verdict, then further details
ParameterSight KeysRecallo
PriceFreeFree
Rating5.0 (2 ratings) — better—
Number of ratings2 — better—
Update frequencyWeeklyWeekly
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.115.0 — better
Further details — not scored
Size94 MB50 MB
Age rating4+4+
DeveloperKarol LangeNils Honus

In-app purchases

1 purchases

Sight Keys

One-time1
  • Sight Keys Premium$4.49
2 purchases

Recallo

Subscriptions2
  • Premium – Monatlich$6.991 Month
  • Premium – Jährlich$49.991 Year

Questions

Is Sight Keys free?
Sight Keys is free to download, with in-app purchases available.
Is Recallo free?
Recallo is free to download, with in-app purchases available.
Do Sight Keys or Recallo have ads?
Neither Sight Keys nor Recallo shows ads.
Which is updated more often, Sight Keys or Recallo?
Sight Keys ships an update weekly, and Recallo weekly. Most recently, Sight Keys was updated on October 24, 2026 and Recallo on October 24, 2026.

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