ProofSketch vs SpellingBridge
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
ProofSketch
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ProofSketch helps you structure mathematical proofs through theorem cards, linked proof steps, lemmas, dependency maps, revision history, and PDF export. It does not generate proofs, verify correctness, provide hints, or evaluate accuracy.
SpellingBridge
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SpellingBridge helps learners build words step by step through bridge routes, syllable checks, spelling repairs, and saved reflection cards. Explore local word packs, review spelling patterns, and revisit past bridge cards.
Screenshots
Verdict
The clearest difference is update cadence: ProofSketch at every 5 days against SpellingBridge's every 2 weeks. On price, ads, 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. Neither carries in-app purchases, so what you see is what you pay.
ProofSketch ships an update every 5 days, SpellingBridge every 2 weeks. Both last shipped on September 21, 2026.
| Parameter | ProofSketch | SpellingBridge |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 5 days — better | Every 2 weeks |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 13.0 | 13.0 |
| Further details — not scored | ||
| Size | 34 MB | 31 MB |
| Age rating | 4+ | 4+ |
| Developer | Simge nur Karadag | Alperen ege Karadag |
In-app purchases
ProofSketch
No in-app purchases
SpellingBridge
No in-app purchases
Questions
Is ProofSketch free?
Is SpellingBridge free?
Do ProofSketch or SpellingBridge have ads?
Which is updated more often, ProofSketch or SpellingBridge?
Other comparisons
