SnapCalc vs Siren's Spellbook
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
SnapCalc
Instantly solve math problems by taking a photo. Get step-by-step explanations for algebra, calculus, and more. Practice with quizzes and access educational resources.
- Camera-based math problem solving
- Step-by-step solution explanations
- Recognizes handwritten problems
- Quizzes for skill practice
- Integrated educational resources
- Problem history saving
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SnapCalc does the math for you. Just snap a picture of a math problem, and voila — the answer is displayed on your screen. From algebra to calculus, the app has solutions to a wide range of topics - and it recognizes handwritten problems too! Learn more quickly and easily with step-by-step explanations so that next time you'll be able to solve the problem yourself - as easy as one-two-three! SnapCalc will be your mathematical lifesaver - finish your homework faster, prepare better for tests, and make getting those high grades less stressful. Not so strong in math or need some extra help with it sometimes? SnapCalc is just for you. SnapCalc is always here to help: Handwritten problem? No worries - SnapCalc recognizes both handwritten problems as well as printed ones. Just snap a problem or upload one from your photo gallery. Want to see the steps too? SnapCalc provides both straight answers and the corresponding step-by-step solutions. Need some training before a test? Check your math skills with SnapCalc's Quizzes and challenge yourself for even better results! Prefer to study math without a teacher? Learn about various math topics with educational YouTube videos and Wikipedia articles. Want to review an old problem? SnapCalc will save your results in "History" tab so you can go back to them anytime. Solve math problems instantly across a wide range of topics, ranging from Arithmetic to Calculus. Math is hard - but with SnapCalc, it's never been easier. Get SnapCalc Premium Upgrade to Premium version and get step-by-step solutions and remove ads. * Subscription payments will be charged to your iTunes account at confirmation of your purchase and upon commencement of each renewal term. * You can cancel the subscription anytime by canceling your subscription through your iTunes account settings. This must be done 24 hours before the end of subscription period to avoid being charged. The cancellation will take effect the day after the last day of the current subscription period, and you will be downgraded to the free service. For complete access to all SnapCalc features, you will need to allow access to the following: *Camera – so that the app could recognize a math problem after taking a pic and then solve it. Privacy Policy: https://support.bendingspoons.com/privacy.html?app=1267331464 Terms of service: https://support.bendingspoons.com/tos.html?app=1267331464 Contact us: snapcalc@bendingspoons.com
Siren's Spellbook
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Siren’s Spellbook is the singers' companion for learning scales, modes, solfège, audiation, and the moods and characters of the Classical Modes, using the timeless Kodály inspired approach. The app helps singers study not only how of the Classical Modes sounds, but also how each parent scale and rotation feels, functions, and is traditionally named. Inside the free companion app for iPhone and iPad you can: • Hear scale demonstrations and technical studies of every scale with accurate tempo-based playback. • Learn to recognise and use the archetypal mood and character of the parent-scales and modes and use them in your singing and composition. • Learn the construction of character and mood archetypes, showing how interval tendencies combine into more complex modal identities. • Practice with a built-in metronome synced to the selected BPM. • Explore parent scales and modal rotations across pentatonic, diatonic, harmonic, melodic, neapolitan, double harmonic, Hungarian minor, whole-tone, augmented hexatonic, diminished octatonic, and chromatic families. • Access reference pages for Western modes and Carnatic/Karnataka pitch-set equivalents. • Sing the scales using the movable-Do solfège with chromatic alterations, octave markers, and a parent-relative rotational logic inspired by Kodály pedagogy. • Learn to use the Curwen hand signs to assist with visually and kinaesthetically anchoring the intervals with the solfège. The app is designed differently for each device: • On iPad, the complete Siren's Spellbook sheet music for all scales and modes is included with full workbook page viewing and inline playback controls as an IN-APP FULL SHEET MUSIC PURCHASE. • On iPhone, it works as a practical singing companion to the physical version of Siren's spellbook, which is available to purchase separately. The companion app has fast playback buttons for the exercises, making it easy to use alongside the physical book. The iPhone app does not include the sheet music, even with the full sheet music purchase. It is audio only. Siren’s Spellbook is especially useful for: • singers studying solfege and audiation • students learning modal colour and function • teachers working with Kodaly-inspired training • anyone wanting a deeper, more expressive understanding of scales and modes If you want to move beyond memorising note patterns and start hearing the inner character of each modal family, Siren’s Spellbook offers a structured and musical path into modal practice.
Screenshots
Verdict
The clearest difference is ads: Siren's Spellbook at none against SnapCalc's shown. SnapCalc's advantage is iOS requirement (13.0 vs 17.0). 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
Both are free to download. SnapCalc sells 9 in-app purchases, starting at $1.99 per 7 days and Siren's Spellbook sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.
SnapCalc ships an update monthly, Siren's Spellbook every 2 weeks. The most recent releases landed on November 12, 2026 and November 5, 2026 respectively.
| Parameter | SnapCalc | Siren's Spellbook |
|---|---|---|
| Price | Free | Free |
| Rating | 4.2 (41K ratings) — better | — |
| Positive reviews | 25.3% of reviews | — |
| Number of ratings | 41K — better | — |
| Update frequency | Monthly | Every 2 weeks — better |
| Ads | Yes | No — better |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 13.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 129 MB | 26 MB |
| Age rating | 4+ | 4+ |
| Developer | Mosaic S.r.l. | Jordan Collin |
Bugs and requests
SnapCalc
Reported bugs
2 issues- App crashes when trying to solve problems
- Subscription charges continue even after cancellation
Requested features
3 requests- Expand free version capabilities
- Improve problem recognition accuracy
- Add option to purchase one-time access
Siren's Spellbook
Not enough reviews yet to summarise bugs or requests.
In-app purchases
SnapCalc
- Step-by-step Solutions 1 Week$1.997 Days
- Step-By-Step Solutions 1 Month3 Days trial$3.991 Month
- Step-by-step Solutions 1 Month3 Days trial$4.991 Month
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- Step-by-step Solutions 1 Week3 Days trial$4.997 Days
- Step-by-step Solutions 1 Month2 variants$4.997 Days
- Step-by-step Solutions 1 Week3 Days trial$5.997 Days
- Step-by-step Solutions 1 Month$6.991 Month
- Step-by-step Solutions 3 M3 Days trial$29.993 Months
- Step-by-step Solutions 1 Year3 Days trial$39.991 Year
Siren's Spellbook
- Siren’s Spellbook iPad Sheet Music$14.99
Questions
Is SnapCalc free?
Is Siren's Spellbook free?
Do SnapCalc or Siren's Spellbook have ads?
Which is updated more often, SnapCalc or Siren's Spellbook?
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