ISO Fits vs Staalprofielen
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
ISO Fits
Calculate ISO fits and tolerances for shafts and bores. Supports metric and inch units, displays detailed fit definitions, and includes visual charts and educational videos.
- ISO fits calculation
- Tolerance class display
- Metric/inch unit switching
- Tolerance charts
- Updated YouTube videos
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It includes the following features: - Fits calculation: Upon entering the nominal diameter (of either bore or shaft), users select their tolerance classes for bore and shaft. The app then provides the complete ISO fits definition with all relevant values. - Tolerances: Shows the tolerances for the most commonly used ISO tolerance classes. - switch between metric and inch version. - Charts: Shows the most common ISO tolerances classes in a diagram. - Videos: Features the automatically updated latest TSS youtube videos. The results of this application are based on DIN ISO 286 Nominal dimension: 1-3150mm following tolerances included: Shaft: a9, a10, a11, a12, a13, b8, b9, b10, b11, b12, b13, c8, c9, c10, c11, c12, cd5, cd6, cd7, cd8, cd9, cd10, d5, d6, d7, d8, d9, d10, d11, d12, d13, e5, e6, e7, e8, e9, e10, ef3, ef4, ef5, ef6, ef7, ef8, ef9, ef10, f3, f4, f5, f6, f7, f8, f9, f10, fg3, fg4, fg5, fg6, fg7, fg8, fg9, fg10, g3, g4, g5, g6, g7, g8, g9, g10, h1, h2, h3, h4, h5, h6, h7, h8, h9, h10, h11, h12, h13, h14, h15, h16, h17, h18, js1, js2, js3, js4, js5, js6, js7, js8, js9, js10, js11, js12, js13, js14, js15, js16, js17, js18, j5, j6, j7, j8, k3, k4, k5, k6, k7, k8, k9, k10, k11, k12, k13, m3, m4, m5, m6, m7, m8, m9, n3, n4, n5, n6, n7, n8, n9, p3, p4, p5, p6, p7, p8, p9, p10, r3, r4, r5, r6, r7, r8, r9, r10, s3, s4, s5, s6, s7, s8, s9, s10, t5, t6, t7, t8, u5, u6, u7, u8, u9, v5, v6, v7, v8, x5, x6, x7, x8, x9, x10, y6, y7, y8, y9, y10, z6, z7, z8, z9, z10, z11, za6, za7, za8, za9, za10, za11, zb7, zb8, zb9, zb10, zb11, zc7, zc8, zc9, zc10, zc11 Bore: A9, A10, A11, A12, A13, B8, B9, B10, B11, B12, B13, C8, C9, C10, C11, C12, C13, CD6, CD7, CD8, CD9, CD10, D6, D7, D8, D9, D10, D11, D12, D13, E5, E6, E7, E8, E9, E10, EF3, EF4, EF5, EF6, EF7, EF8, EF9, EF10, F3, F4, F5, F6, F7, F8, F9, F10, FG3, FG4, FG5, FG6, FG7, FG8, FG9, FG10, G3, G4, G5, G6, G7, G8, G9, G10, H1, H2, H3, H4, H5, H6, H7, H8, H9, H10, H11, H12, H13, H14, H15, H16, H17, H18, JS1, JS2, JS3, JS4, JS5, JS6, JS7, JS8, JS9, JS10, JS11, JS12, JS13, JS14, JS15, JS16, JS17, JS18, J6, J7, J8, J9, K3, K4, K5, K6, K7, K8, K9, K10, M3, M4, M5, M6, M7, M8, M9, M10, N3, N4, N5, N6, N7, N8, N9, N10, N11, P3, P4, P5, P6, P7, P8, P9, P10, R3, R4, R5, R6, R7, R8, R9, R10, S3, S4, S5, S6, S7, S8, S9, S10, T5, T6, T7, T8, U5, U6, U7, U8, U9, U10, V5, V6, V7, V8, X5, X6, X7, X8, X9, X10, Y6, Y7, Y8, Y9, Y10, Z6, Z7, Z8, Z9, Z10, Z11, ZA6, ZA7, ZA8, ZA9, ZA10, ZA11, ZB7, ZB8, ZB9, ZB10, ZB11, ZC7, ZC8, ZC9, ZC10, ZC11
Staalprofielen
Access a comprehensive catalog of steel profiles, including dimensions and steel grades available in stock or with short delivery times. Key technical data for various steel types is also provided.
- Stock program of steel traders
- Available dimensions and steel grades
- Delivery within three working days
- Key technical data
- Catalog of various steel profiles
- Reinforcing steel information
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Staalprofielen is een gratis app met het voorraadprogramma van handelaren, aangesloten bij de Koninklijke Staalfederatie. Per product zijn de beschikbare afmetingen en staalsoorten vermeld die op voorraad liggen óf die binnen drie werkdagen leverbaar zijn. Ook de belangrijkste technische gegevens zijn opgenomen. De app Staalprofielen bevat informatie over de volgende profielen: balkstaal • breedflensbalken HEA / HEB /HE • profielbalken IPE / INP / UPE / UNP stafstaal • massief rond / vierkant / plat • hoekprofiel gelijkzijdig / ongelijkzijdig • T-profiel gelijkzijdig / ongelijkzijdig • klein U-staal • platbulb stripstaal platen • koudgewalst onbehandeld (licht geolied) verzinkt (elektrolytisch) verzinkt (thermisch) • warmgewalst onbehandeld gebeitst/geolied buizen • rond gelast/naadloos • vierkant koud- en warmgevormd • rechthoekig koud- en warmgevormd koudgevormd • C-profiel • L-profiel gelijkzijdig / ongelijkzijdig • U-profiel gelijkzijdig / ongelijkzijdig • Z-profiel • Omega-profiel • rail-profiel betonstaal • staven De app Staalprofielen is een uitgave van Bouwen met Staal.
Screenshots
Verdict
The clearest difference is in-app purchases: Staalprofielen at none against ISO Fits's 1. ISO Fits's advantage is update cadence (every 5 months vs every 40 months) and ratings volume (6 vs 1). On price, rating, ads 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. ISO Fits sells 1 one-off in-app purchase. Staalprofielen asks for nothing beyond the download.
ISO Fits holds the better App Store score, 4.2 against 4.0. That said, the two scores are not equally well evidenced: ISO Fits has 6 ratings behind it against 1, so its average is the more settled of the two.
ISO Fits ships an update every 5 months, Staalprofielen every 40 months. The most recent releases landed on October 23, 2026 and October 16, 2026 respectively.
| Parameter | ISO Fits | Staalprofielen |
|---|---|---|
| Price | Free | Free |
| Rating | 4.2 (6 ratings) — better | 4.0 (1 ratings) |
| Positive reviews | 94.6% of reviews | — |
| Number of ratings | 6 — better | 1 |
| Update frequency | Every 5 months — better | Every 40 months |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.6 | 15.0 — better |
| Further details — not scored | ||
| Size | 66 MB | 55 MB |
| Age rating | 4+ | 4+ |
| Developer | Trelleborg Sealing Solutions | Bouwen met Staal |
Customer experience
ISO Fits
Staalprofielen
In-app purchases
ISO Fits
- Full Version with complete ISO286 Standard$1.99
Staalprofielen
No in-app purchases
Questions
Is ISO Fits free?
Is Staalprofielen free?
Which has better reviews, ISO Fits or Staalprofielen?
Do ISO Fits or Staalprofielen have ads?
Which is updated more often, ISO Fits or Staalprofielen?
Other comparisons
